Episode Summary
Police confirm Liu Yuanyuan was a paid test-taker for lookalike Ding Youmei. Forensic evidence in the lab freezer proves Ding Youmei impersonated the victim to fake an exit. Gao Huilan confesses to letting Liu's mother die and later killing Liu Yuanyuan with a hammer to protect her daughter. Ding Youmei ends the episode with a chilling laugh after hearing her mother took the fall.
Spoiler Alert
The Doppelgänger Scam
We finally got the confirmation we were waiting for. Liu Yuanyuan and Ding Youmei aren't just similar. They are practically identical. Zhu Qingyue immediately suspects the obvious. Liu Yuanyuan was taking exams for Ding Youmei.
The evidence backs this up. Security footage shows "Liu Yuanyuan" leaving Gao Huilan’s lab. She leaves fifteen minutes after entering. She hides her face. She carries a plastic bag. It looks suspicious.
Wan Guoxin digs into the finances. He finds the smoking gun. Gao Huilan sent money to Liu Yuanyuan. She hid the paper trail by using Liu’s mother's bank account. The payments go back eleven years. That timeline matches Liu Yuanyuan’s college entrance exams and Ding Youmei’s TOEFL test. Gao Huilan didn't stop there. She also paid off Luan Fang, another student in the same exam room.
The Cover Story
Ding Youmei cracks under pressure. She admits to the cheating. She claims her mother arranged everything. Gao Huilan spins a sob story to match. She says she performed a free surgery for Liu Yuanyuan’s mother years ago. She claims Liu Yuanyuan used the exam fraud to blackmail her ever since.
According to their story, Liu Yuanyuan came to the lab after her mother died. They fought. Liu pulled a knife. Ding Youmei stepped in to save her mom. They claim Liu Yuanyuan eventually calmed down and left on her own. When the cops show Ding Youmei the blurry photo of the person leaving the building, she identifies it as Liu Yuanyuan immediately. It’s too fast. It feels rehearsed.
Cracking the Alibi
The police hit a wall. There is no hard proof linking the death to these two women yet. The video outside is a mess. You can’t see the face.
Han Feng has a theory. He thinks Ding Youmei dressed up as the victim. She could have left the building with the head in that bag. Then, she sneaked back in through a fence to avoid the main gate cameras. The only hole in the theory is the internal building security.
Qi Sizhe finds the missing piece. He discovers fibers and human tissue in a gap inside the specimen freezer. It doesn't match the cadavers. He points out a gruesome detail. When schools move cadavers, they use body bags. It’s the perfect camouflage.
Gao Yuan runs the tests. The fiber matches Liu Yuanyuan’s coat. The tissue belongs to Ding Youmei. That changes everything. Ding Youmei was wearing the victim's coat. Gao Huilan lied. Liu Yuanyuan never walked out of that lab alive.
The Mother's Confession
The police close in. They test Ding Youmei’s blood. They scour the lab. They find massive amounts of the victim's blood. They find Ding Youmei’s DNA inside the corpse cabinet.
Gao Huilan confesses. She takes the blame for everything.
She explains how it started. She met Liu Yuanyuan at the hospital years ago and mistook her for her own daughter. Ding Youmei was failing school. Her father was furious. Gao Huilan saw a way out. She offered to save Liu’s mother in exchange for the exam swap.
But Gao Huilan went further. She thought Liu’s mother was a burden. She visited the sick woman. She told her she was a bottomless pit dragging her daughter down. The mother had a heart attack right then. She pointed at her medicine. Gao Huilan threw the pills away. She watched the woman die.
The Final Twist
Liu Yuanyuan figured it out. She found a button her mother had ripped off Gao Huilan’s clothes during the struggle. She went to the lab to confront the killer. She tried to stab Ding Youmei. Gao Huilan grabbed a hammer and killed her. She then dressed her daughter in the dead girl's clothes to fake an exit.
The button still has fingerprints from all three women. It seals the case.
Zhu Qingyue tells Ding Youmei the news. Her mother confessed to intentional homicide. Ding Youmei cries. She blames herself. Zhu Qingyue mentions that Ding Youmei will face charges for harboring a criminal, though the court might be lenient.
Zhu Qingyue leaves the room. Alone in the interrogation room, Ding Youmei’s sobbing changes. She starts laughing.
