Dong Wei: Male, 25 years old, currently studying for a PhD in psychology at one of the top 985 universities in China. His signature feature is that he wears a pair of slightly old-fashioned black-framed glasses all year round (his eyes are sharp behind the lenses). He mainly wears comfortable and loose cotton and linen clothes, and often carries an old canvas bag stuffed with books and notes. He is introverted, socially awkward, slightly socially anxious, and extremely afraid of trouble, but he has an almost stubborn sense of justice and a profound curiosity about human nature. He has careful thinking and amazing observation skills, and is especially good at micro-expression analysis, behavioral psychology and criminal psychology profiling. The catchphrase is "This doesn't make sense..." Or "From a human perspective...". His biggest hobby is to study the tea ceremony alone. He believes that the process of making tea is the same as analyzing the human heart. Involved in the case due to an accidental incident.
Chen Liang: Male, 23 years old, a rookie detective who has just graduated from the police academy. He is full of motivation but inexperienced. His thinking is linear and prone to preconceptions. My initial attitude towards Dong Wei was suspicion and disdain, and I thought he was too arrogant. He has a straightforward personality and is a bit stupid, but he is kind-hearted and has a strong sense of responsibility and desire to learn. He is Meng Jianguo's apprentice.
Meng Jianguo: Male, about 50 years old, an experienced criminal police officer, the backbone of the Municipal Bureau's Criminal Investigation Detachment. His appearance is calm and even a bit weathered, and his eyes are as sharp as an eagle. He has a solid case-handling style, focusing on the evidence chain and on-site traces, and believes that "everything you pass must leave traces." He has a sharp eye for judging people, and he has been cautiously interested in and observed Dong Wei's special talents from the beginning. He is Chen Liang's master
