WEBVTT
00:00:09.759 --> 00:00:14.880
At 5 13 p.m., a message came through a tutoring app.
00:00:15.599 --> 00:00:18.079
A parent was looking for help.
00:00:18.960 --> 00:00:20.239
English lessons.
00:00:20.640 --> 00:00:21.839
Short notice.
00:00:22.239 --> 00:00:23.359
Good pay.
00:00:24.640 --> 00:00:30.480
For tutors in South Korea, requests like that are part of how work happens now.
00:00:31.039 --> 00:00:40.640
A profile appears, a message comes in, and within minutes a lesson can be arranged with someone you've never met.
00:00:42.159 --> 00:00:51.439
The woman who received this message was in her twenties, a university student in Busan, picking up private tutoring on the side.
00:00:52.240 --> 00:01:03.759
Work like that falls between freelance and necessity, flexible, better paid than most part-time roles, and quick to arrange.
00:01:05.040 --> 00:01:08.879
The parent sounded polite, reassuring.
00:01:09.200 --> 00:01:13.439
She offered to bring her daughter over for a first meeting.
00:01:14.159 --> 00:01:19.599
It read like a normal request, but it wasn't.
00:01:22.480 --> 00:01:25.519
You are listening to Missing Context.
00:01:25.840 --> 00:01:29.519
Stories from Asia and the Asian Diaspora.
00:01:32.879 --> 00:01:39.599
Police would later say the account belonged to a 23-year-old woman named Zhang Yu Zhang.
00:01:40.079 --> 00:01:43.200
She didn't have a child who needed lessons.
00:01:43.840 --> 00:01:54.079
Investigators believe she had spent weeks messaging female tutors through the platform, gradually narrowing in on someone who lived alone.
00:01:55.599 --> 00:02:01.439
Busan is a city where this kind of interaction barely registers.
00:02:02.000 --> 00:02:04.400
Private tutoring is everywhere.
00:02:04.560 --> 00:02:12.319
It's part of how families plan, how students compete, how young people earn money.
00:02:13.919 --> 00:02:19.680
Most retellings of this case focus on what happened inside the home.
00:02:19.919 --> 00:02:24.560
The violence, the bloody suitcase, the aftermath.
00:02:25.599 --> 00:02:39.039
This one begins earlier with a tutoring inquiry, and a choice that seemed so ordinary that it was made in less than a minute.
00:02:41.199 --> 00:02:48.080
May twenty sixth, twenty twenty three, late afternoon in a residential part of Busan.
00:02:48.879 --> 00:02:55.280
A young woman opens her door, expecting a consultation arranged through the tutoring app.
00:02:56.000 --> 00:03:00.879
She may have expected a parent to arrive with their teenage daughter.
00:03:01.360 --> 00:03:07.120
Instead, there's just the daughter, a young girl in school uniform.
00:03:08.319 --> 00:03:19.840
Police say Zhang Yu Zheng built the interaction in stages, first presenting herself as the mother, then arriving as the student.
00:03:20.639 --> 00:03:34.000
It sounds elaborate in hindsight, but at the time it would have looked exactly like the beginning of a lesson, a high school student needing help with her English coursework.
00:03:34.639 --> 00:03:39.199
The tutor didn't see a stranger pretending to be someone else.
00:03:39.439 --> 00:03:43.680
She saw a sixteen-year-old girl who'd arrived for an appointment.
00:03:44.560 --> 00:03:48.479
So she stepped aside and let her in.
00:03:51.199 --> 00:03:59.120
To understand why that moment didn't raise concern, we have to look at the environment it came out of.
00:03:59.599 --> 00:04:04.080
In South Korea, education shapes far more than grades.
00:04:04.719 --> 00:04:13.199
It influences where you study, what jobs you can access, how much you earn, even marriage prospects.
00:04:13.520 --> 00:04:18.399
For many families, it's one of the most reliable paths upward.
00:04:19.120 --> 00:04:23.920
That pressure shows up early and it shows up everywhere.
00:04:24.240 --> 00:04:29.519
Private tutoring isn't occasional, it's built into daily life.
00:04:30.079 --> 00:04:41.120
One-on-one lessons promise speed, attention, an edge in a system where small differences can determine which schools remain within reach.
00:04:43.040 --> 00:04:55.680
In cities like Busan, that demand creates constant interactions between people who don't know each other, parents looking for help, college students offering it.
00:04:56.879 --> 00:04:59.759
APS accelerated that exchange.
00:05:00.240 --> 00:05:06.319
What used to rely on referrals or word of mouth now happens in minutes.
00:05:06.720 --> 00:05:12.000
A profile, a short conversation, and a meeting is set.
00:05:13.120 --> 00:05:17.839
After enough lessons, you're no longer thinking about meeting strangers.
00:05:18.079 --> 00:05:26.560
You're thinking about your schedule, whether the student is a good fit, whether the lesson will turn into regular work.
00:05:27.360 --> 00:05:32.399
It starts to feel like part of the job, a source of income.
00:05:33.360 --> 00:05:38.959
And people tend to approach work with a different mindset than danger.
00:05:39.199 --> 00:05:51.199
They're thinking about timings, payments, and logistics, not whether the person on the other side of the conversation is who they claim to be.
00:05:54.879 --> 00:05:59.120
Most coverage reduces her to a single line.
00:05:59.519 --> 00:06:01.600
A tutor in her twenties.
00:06:02.319 --> 00:06:07.920
Accurate, but it leaves out what explains the decision she made.
00:06:09.120 --> 00:06:19.040
She was doing what thousands of students do, responding to a request that matched her skills, arranging a session, expecting a client.
00:06:19.920 --> 00:06:22.959
There's a pattern across this kind of work.
00:06:23.439 --> 00:06:31.279
A driver sees a ride request, a host sees a guest, a tutor sees a student.
00:06:32.000 --> 00:06:39.759
By the time the contact is made, both people already know the roles they're supposed to play.
00:06:40.639 --> 00:06:45.600
Police said there was no prior connection between the two women.
00:06:45.920 --> 00:06:54.319
No history, no conflict, no threats, nothing that would have set off alarm bells, just a tutoring request.
00:06:54.639 --> 00:07:00.639
The kind that college students across South Korea respond to every day.
00:07:02.399 --> 00:07:09.839
Investigators later said Zhang Yu Zheng told them she wanted to know what it would feel like to kill someone.
00:07:10.160 --> 00:07:16.639
She'd spent time consuming crime content, thinking about how she might act on it.
00:07:17.600 --> 00:07:20.560
So she didn't choose randomly.
00:07:20.800 --> 00:07:28.639
She looked for someone accessible, someone working alone, someone used to opening the door to new clients.
00:07:29.439 --> 00:07:38.319
And that kind of person isn't hard to find when the job itself, oftentimes, depends on letting people in.
00:07:41.839 --> 00:07:47.120
Police say Zhang Yujiang contacted dozens of tutors before the killing.
00:07:47.360 --> 00:07:51.680
She didn't need to follow anyone or wait for the right moment.
00:07:52.639 --> 00:07:59.199
She could sit behind a screen, sending message after message, adjusting as she went.
00:07:59.759 --> 00:08:02.720
Each reply gave her information.
00:08:03.519 --> 00:08:05.519
Who responded quickly?
00:08:05.839 --> 00:08:07.920
Who was open to meeting?
00:08:08.399 --> 00:08:12.399
Who was comfortable bringing a new client into their home?
00:08:14.079 --> 00:08:18.959
At the same time, Zhang Yuzheng's own life seemed stalled.
00:08:19.439 --> 00:08:35.120
Reports described a young woman who hadn't secured steady work, who hadn't entered university, who spent long stretches of time online, increasingly disconnected from face-to-face social relationships.
00:08:37.120 --> 00:08:41.919
The person she chose looked very different from her on paper.
00:08:42.399 --> 00:08:51.919
Attending university, earning money, building the kind of adult life Zhang Yujiang herself had struggled to establish.
00:08:53.440 --> 00:08:57.919
That contrast comes up constantly in discussions of the case.
00:08:58.320 --> 00:09:03.840
Not as an explanation, but as part of how Zhang Yujiang selected.
00:09:05.039 --> 00:09:09.200
The platform didn't just connect her to potential tutors.
00:09:09.679 --> 00:09:11.679
It showed her how they worked.
00:09:11.919 --> 00:09:14.159
It showed her their background.
00:09:14.879 --> 00:09:17.440
It also created distance.
00:09:18.399 --> 00:09:21.600
She never saw the tutor studying for exams.
00:09:22.000 --> 00:09:28.000
She never met her friends, never sat across from her in a classroom.
00:09:28.320 --> 00:09:34.639
The relationship existed almost entirely inside messages and profile pages.
00:09:35.600 --> 00:09:40.240
Distance has a way of stripping away context.
00:09:42.960 --> 00:09:46.399
For most people, that's just how the service works.
00:09:46.559 --> 00:09:48.960
It's quick and transactional.
00:09:49.279 --> 00:09:53.919
For Zhang Yujiang, it created a different kind of opportunity.
00:09:54.320 --> 00:09:57.840
She didn't need to leave the house and search for someone.
00:09:58.080 --> 00:10:00.399
She didn't need to follow anyone.
00:10:00.639 --> 00:10:03.919
She didn't need to approach strangers face to face.
00:10:04.240 --> 00:10:08.720
The screening process happened from her bedroom behind a keyboard.
00:10:09.039 --> 00:10:14.240
Zhang Yuzheng could keep trying until she found someone who fit.
00:10:14.639 --> 00:10:19.600
And she didn't have to face that person until the door opened.
00:10:22.720 --> 00:10:27.440
Platforms like tutoring apps are built for speed and ease.
00:10:27.679 --> 00:10:34.000
That's what makes them effective, especially in a market with this level of demand.
00:10:34.720 --> 00:10:38.000
But safety hasn't always kept pace.
00:10:38.720 --> 00:10:47.679
Reporting around this case pointed to limited identity checks and very little guidance for tutors meeting clients for the first time.
00:10:49.120 --> 00:10:58.720
Other types of gig work have started adding safeguards, trip tracking, verified profiles, prompts to meet people in public.
00:10:59.919 --> 00:11:07.759
Private tutoring often happens behind a closed door, one on one, without those guardrails.
00:11:08.320 --> 00:11:19.440
So the decisions fall to the person doing the work, where to meet, what to confirm, what feels safe?
00:11:20.559 --> 00:11:23.840
Most of the time those judgments work.
00:11:24.559 --> 00:11:32.799
A quick exchange of messages, a glance at a profile, a feeling that nothing seems unusual.
00:11:33.440 --> 00:11:35.519
That's often enough.
00:11:36.720 --> 00:11:43.759
Until someone approaches the same interaction with a very different intention.
00:11:46.320 --> 00:11:59.759
Police say Zhang Yu Zhang killed a tutor inside the apartment, stabbing her more than a hundred times before dismembering the body and placing the remains into a suitcase.
00:12:00.240 --> 00:12:05.600
She later hired a taxi and headed toward a wooded area near Yang San.
00:12:07.200 --> 00:12:10.559
That's where things began to fall apart.
00:12:12.159 --> 00:12:18.399
The taxi driver later told police that something about the scene felt wrong to him.
00:12:18.879 --> 00:12:21.120
The suitcase was stained.
00:12:21.440 --> 00:12:28.000
The passenger looked far too young to be dragging heavy luggage into a wooded area alone.
00:12:28.879 --> 00:12:34.799
The driver couldn't make sense of what he was seeing and eventually called the police.
00:12:35.679 --> 00:12:42.159
And that decision brought everything into the open far sooner than it would have otherwise.
00:12:42.720 --> 00:12:49.679
Investigators would later describe considerable planning in how Zhang Yuzheng approached potential victims.
00:12:50.320 --> 00:12:54.320
The aftermath appears far less sophisticated.
00:12:54.879 --> 00:12:57.279
Finding someone took weeks.
00:12:58.399 --> 00:13:01.120
Losing the body took hours.
00:13:03.759 --> 00:13:07.840
South Korea has seen violent crimes before.
00:13:08.159 --> 00:13:18.639
What made this case headline news for weeks was not just the brutality, it was the route Zhang Yu Zhang took to reach her victim.
00:13:19.600 --> 00:13:27.440
There wasn't a chance encounter, there wasn't a prior relationship, no attempt to force her way inside.
00:13:28.240 --> 00:13:31.679
The introduction had been arranged through an app.
00:13:32.879 --> 00:13:54.480
It disrupted assumptions people rarely examine, that a young woman is safer meeting another woman, that education-related work carries little risk, that a digital profile reflects a real Zhang Yu Zheng was later convicted of murder, corpse mutilation, and abandonment.
00:13:54.720 --> 00:14:00.320
She was sentenced to life imprisonment, a decision upheld on appeal.
00:14:02.080 --> 00:14:07.759
This case prompted conversation that extended well beyond the murder itself.
00:14:08.320 --> 00:14:16.639
Reporting in the aftermath frequently returned to another detail, Zhang Yuzheng's extreme social isolation.
00:14:17.919 --> 00:14:25.679
Investigators described someone who had spent years increasingly disconnected from the people around her.
00:14:26.720 --> 00:14:42.720
At the time, South Korea was already grappling with concerns about socially withdrawn youth, and this case became one more example about what can happen when isolation deepens unnoticed.
00:14:47.120 --> 00:14:54.960
This case is remembered for the violence, but the violence is not what makes it difficult to forget.
00:14:55.600 --> 00:15:01.440
The most disturbing part isn't only that Zhang Yu Zheng found a victim.
00:15:01.840 --> 00:15:04.960
It's how little she had to do to find one.
00:15:05.600 --> 00:15:10.720
A message, a tutoring request, a student needing help with school.
00:15:11.360 --> 00:15:14.240
Trust didn't need to be discussed.
00:15:14.559 --> 00:15:17.679
It was already built into the exchange.
00:15:18.399 --> 00:15:20.559
The app connected them.
00:15:20.879 --> 00:15:24.080
The role explained why they were meeting.
00:15:24.320 --> 00:15:29.120
The school uniform answered questions before they were asked.
00:15:29.919 --> 00:15:40.320
By the time the apartment door was opened for Zhang Yu Sheng on that Friday afternoon, much of the work had already been done for her.
00:15:44.960 --> 00:15:47.279
This is missing context.
00:00:09.759 --> 00:00:14.880
At 5 13 p.m., a message came through a tutoring app.
00:00:15.599 --> 00:00:18.079
A parent was looking for help.
00:00:18.960 --> 00:00:20.239
English lessons.
00:00:20.640 --> 00:00:21.839
Short notice.
00:00:22.239 --> 00:00:23.359
Good pay.
00:00:24.640 --> 00:00:30.480
For tutors in South Korea, requests like that are part of how work happens now.
00:00:31.039 --> 00:00:40.640
A profile appears, a message comes in, and within minutes a lesson can be arranged with someone you've never met.
00:00:42.159 --> 00:00:51.439
The woman who received this message was in her twenties, a university student in Busan, picking up private tutoring on the side.
00:00:52.240 --> 00:01:03.759
Work like that falls between freelance and necessity, flexible, better paid than most part-time roles, and quick to arrange.
00:01:05.040 --> 00:01:08.879
The parent sounded polite, reassuring.
00:01:09.200 --> 00:01:13.439
She offered to bring her daughter over for a first meeting.
00:01:14.159 --> 00:01:19.599
It read like a normal request, but it wasn't.
00:01:22.480 --> 00:01:25.519
You are listening to Missing Context.
00:01:25.840 --> 00:01:29.519
Stories from Asia and the Asian Diaspora.
00:01:32.879 --> 00:01:39.599
Police would later say the account belonged to a 23-year-old woman named Zhang Yu Zhang.
00:01:40.079 --> 00:01:43.200
She didn't have a child who needed lessons.
00:01:43.840 --> 00:01:54.079
Investigators believe she had spent weeks messaging female tutors through the platform, gradually narrowing in on someone who lived alone.
00:01:55.599 --> 00:02:01.439
Busan is a city where this kind of interaction barely registers.
00:02:02.000 --> 00:02:04.400
Private tutoring is everywhere.
00:02:04.560 --> 00:02:12.319
It's part of how families plan, how students compete, how young people earn money.
00:02:13.919 --> 00:02:19.680
Most retellings of this case focus on what happened inside the home.
00:02:19.919 --> 00:02:24.560
The violence, the bloody suitcase, the aftermath.
00:02:25.599 --> 00:02:39.039
This one begins earlier with a tutoring inquiry, and a choice that seemed so ordinary that it was made in less than a minute.
00:02:41.199 --> 00:02:48.080
May twenty sixth, twenty twenty three, late afternoon in a residential part of Busan.
00:02:48.879 --> 00:02:55.280
A young woman opens her door, expecting a consultation arranged through the tutoring app.
00:02:56.000 --> 00:03:00.879
She may have expected a parent to arrive with their teenage daughter.
00:03:01.360 --> 00:03:07.120
Instead, there's just the daughter, a young girl in school uniform.
00:03:08.319 --> 00:03:19.840
Police say Zhang Yu Zheng built the interaction in stages, first presenting herself as the mother, then arriving as the student.
00:03:20.639 --> 00:03:34.000
It sounds elaborate in hindsight, but at the time it would have looked exactly like the beginning of a lesson, a high school student needing help with her English coursework.
00:03:34.639 --> 00:03:39.199
The tutor didn't see a stranger pretending to be someone else.
00:03:39.439 --> 00:03:43.680
She saw a sixteen-year-old girl who'd arrived for an appointment.
00:03:44.560 --> 00:03:48.479
So she stepped aside and let her in.
00:03:51.199 --> 00:03:59.120
To understand why that moment didn't raise concern, we have to look at the environment it came out of.
00:03:59.599 --> 00:04:04.080
In South Korea, education shapes far more than grades.
00:04:04.719 --> 00:04:13.199
It influences where you study, what jobs you can access, how much you earn, even marriage prospects.
00:04:13.520 --> 00:04:18.399
For many families, it's one of the most reliable paths upward.
00:04:19.120 --> 00:04:23.920
That pressure shows up early and it shows up everywhere.
00:04:24.240 --> 00:04:29.519
Private tutoring isn't occasional, it's built into daily life.
00:04:30.079 --> 00:04:41.120
One-on-one lessons promise speed, attention, an edge in a system where small differences can determine which schools remain within reach.
00:04:43.040 --> 00:04:55.680
In cities like Busan, that demand creates constant interactions between people who don't know each other, parents looking for help, college students offering it.
00:04:56.879 --> 00:04:59.759
APS accelerated that exchange.
00:05:00.240 --> 00:05:06.319
What used to rely on referrals or word of mouth now happens in minutes.
00:05:06.720 --> 00:05:12.000
A profile, a short conversation, and a meeting is set.
00:05:13.120 --> 00:05:17.839
After enough lessons, you're no longer thinking about meeting strangers.
00:05:18.079 --> 00:05:26.560
You're thinking about your schedule, whether the student is a good fit, whether the lesson will turn into regular work.
00:05:27.360 --> 00:05:32.399
It starts to feel like part of the job, a source of income.
00:05:33.360 --> 00:05:38.959
And people tend to approach work with a different mindset than danger.
00:05:39.199 --> 00:05:51.199
They're thinking about timings, payments, and logistics, not whether the person on the other side of the conversation is who they claim to be.
00:05:54.879 --> 00:05:59.120
Most coverage reduces her to a single line.
00:05:59.519 --> 00:06:01.600
A tutor in her twenties.
00:06:02.319 --> 00:06:07.920
Accurate, but it leaves out what explains the decision she made.
00:06:09.120 --> 00:06:19.040
She was doing what thousands of students do, responding to a request that matched her skills, arranging a session, expecting a client.
00:06:19.920 --> 00:06:22.959
There's a pattern across this kind of work.
00:06:23.439 --> 00:06:31.279
A driver sees a ride request, a host sees a guest, a tutor sees a student.
00:06:32.000 --> 00:06:39.759
By the time the contact is made, both people already know the roles they're supposed to play.
00:06:40.639 --> 00:06:45.600
Police said there was no prior connection between the two women.
00:06:45.920 --> 00:06:54.319
No history, no conflict, no threats, nothing that would have set off alarm bells, just a tutoring request.
00:06:54.639 --> 00:07:00.639
The kind that college students across South Korea respond to every day.
00:07:02.399 --> 00:07:09.839
Investigators later said Zhang Yu Zheng told them she wanted to know what it would feel like to kill someone.
00:07:10.160 --> 00:07:16.639
She'd spent time consuming crime content, thinking about how she might act on it.
00:07:17.600 --> 00:07:20.560
So she didn't choose randomly.
00:07:20.800 --> 00:07:28.639
She looked for someone accessible, someone working alone, someone used to opening the door to new clients.
00:07:29.439 --> 00:07:38.319
And that kind of person isn't hard to find when the job itself, oftentimes, depends on letting people in.
00:07:41.839 --> 00:07:47.120
Police say Zhang Yujiang contacted dozens of tutors before the killing.
00:07:47.360 --> 00:07:51.680
She didn't need to follow anyone or wait for the right moment.
00:07:52.639 --> 00:07:59.199
She could sit behind a screen, sending message after message, adjusting as she went.
00:07:59.759 --> 00:08:02.720
Each reply gave her information.
00:08:03.519 --> 00:08:05.519
Who responded quickly?
00:08:05.839 --> 00:08:07.920
Who was open to meeting?
00:08:08.399 --> 00:08:12.399
Who was comfortable bringing a new client into their home?
00:08:14.079 --> 00:08:18.959
At the same time, Zhang Yuzheng's own life seemed stalled.
00:08:19.439 --> 00:08:35.120
Reports described a young woman who hadn't secured steady work, who hadn't entered university, who spent long stretches of time online, increasingly disconnected from face-to-face social relationships.
00:08:37.120 --> 00:08:41.919
The person she chose looked very different from her on paper.
00:08:42.399 --> 00:08:51.919
Attending university, earning money, building the kind of adult life Zhang Yujiang herself had struggled to establish.
00:08:53.440 --> 00:08:57.919
That contrast comes up constantly in discussions of the case.
00:08:58.320 --> 00:09:03.840
Not as an explanation, but as part of how Zhang Yujiang selected.
00:09:05.039 --> 00:09:09.200
The platform didn't just connect her to potential tutors.
00:09:09.679 --> 00:09:11.679
It showed her how they worked.
00:09:11.919 --> 00:09:14.159
It showed her their background.
00:09:14.879 --> 00:09:17.440
It also created distance.
00:09:18.399 --> 00:09:21.600
She never saw the tutor studying for exams.
00:09:22.000 --> 00:09:28.000
She never met her friends, never sat across from her in a classroom.
00:09:28.320 --> 00:09:34.639
The relationship existed almost entirely inside messages and profile pages.
00:09:35.600 --> 00:09:40.240
Distance has a way of stripping away context.
00:09:42.960 --> 00:09:46.399
For most people, that's just how the service works.
00:09:46.559 --> 00:09:48.960
It's quick and transactional.
00:09:49.279 --> 00:09:53.919
For Zhang Yujiang, it created a different kind of opportunity.
00:09:54.320 --> 00:09:57.840
She didn't need to leave the house and search for someone.
00:09:58.080 --> 00:10:00.399
She didn't need to follow anyone.
00:10:00.639 --> 00:10:03.919
She didn't need to approach strangers face to face.
00:10:04.240 --> 00:10:08.720
The screening process happened from her bedroom behind a keyboard.
00:10:09.039 --> 00:10:14.240
Zhang Yuzheng could keep trying until she found someone who fit.
00:10:14.639 --> 00:10:19.600
And she didn't have to face that person until the door opened.
00:10:22.720 --> 00:10:27.440
Platforms like tutoring apps are built for speed and ease.
00:10:27.679 --> 00:10:34.000
That's what makes them effective, especially in a market with this level of demand.
00:10:34.720 --> 00:10:38.000
But safety hasn't always kept pace.
00:10:38.720 --> 00:10:47.679
Reporting around this case pointed to limited identity checks and very little guidance for tutors meeting clients for the first time.
00:10:49.120 --> 00:10:58.720
Other types of gig work have started adding safeguards, trip tracking, verified profiles, prompts to meet people in public.
00:10:59.919 --> 00:11:07.759
Private tutoring often happens behind a closed door, one on one, without those guardrails.
00:11:08.320 --> 00:11:19.440
So the decisions fall to the person doing the work, where to meet, what to confirm, what feels safe?
00:11:20.559 --> 00:11:23.840
Most of the time those judgments work.
00:11:24.559 --> 00:11:32.799
A quick exchange of messages, a glance at a profile, a feeling that nothing seems unusual.
00:11:33.440 --> 00:11:35.519
That's often enough.
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Until someone approaches the same interaction with a very different intention.
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Police say Zhang Yu Zhang killed a tutor inside the apartment, stabbing her more than a hundred times before dismembering the body and placing the remains into a suitcase.
00:12:00.240 --> 00:12:05.600
She later hired a taxi and headed toward a wooded area near Yang San.
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That's where things began to fall apart.
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The taxi driver later told police that something about the scene felt wrong to him.
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The suitcase was stained.
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The passenger looked far too young to be dragging heavy luggage into a wooded area alone.
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The driver couldn't make sense of what he was seeing and eventually called the police.
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And that decision brought everything into the open far sooner than it would have otherwise.
00:12:42.720 --> 00:12:49.679
Investigators would later describe considerable planning in how Zhang Yuzheng approached potential victims.
00:12:50.320 --> 00:12:54.320
The aftermath appears far less sophisticated.
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Finding someone took weeks.
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Losing the body took hours.
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South Korea has seen violent crimes before.
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What made this case headline news for weeks was not just the brutality, it was the route Zhang Yu Zhang took to reach her victim.
00:13:19.600 --> 00:13:27.440
There wasn't a chance encounter, there wasn't a prior relationship, no attempt to force her way inside.
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The introduction had been arranged through an app.
00:13:32.879 --> 00:13:54.480
It disrupted assumptions people rarely examine, that a young woman is safer meeting another woman, that education-related work carries little risk, that a digital profile reflects a real Zhang Yu Zheng was later convicted of murder, corpse mutilation, and abandonment.
00:13:54.720 --> 00:14:00.320
She was sentenced to life imprisonment, a decision upheld on appeal.
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This case prompted conversation that extended well beyond the murder itself.
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Reporting in the aftermath frequently returned to another detail, Zhang Yuzheng's extreme social isolation.
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Investigators described someone who had spent years increasingly disconnected from the people around her.
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At the time, South Korea was already grappling with concerns about socially withdrawn youth, and this case became one more example about what can happen when isolation deepens unnoticed.
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This case is remembered for the violence, but the violence is not what makes it difficult to forget.
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The most disturbing part isn't only that Zhang Yu Zheng found a victim.
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It's how little she had to do to find one.
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A message, a tutoring request, a student needing help with school.
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Trust didn't need to be discussed.
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It was already built into the exchange.
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The app connected them.
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The role explained why they were meeting.
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The school uniform answered questions before they were asked.
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By the time the apartment door was opened for Zhang Yu Sheng on that Friday afternoon, much of the work had already been done for her.
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This is missing context.
