A security guard who lives in a small apartment building in the community remembers Tong Xiaoge. Her arrival brought some brightness to this quiet community.

That day she was wearing simple jeans and a loose white shirt, her hair was casually tied into a ponytail, and she had a bright smile on her face.

The guard's words recorded in the detective's notebook became the key for Fu Chen to solve the mystery.

After learning the news, Fu Chen did not hesitate at all. He ...