Chang Er, a literary city in Jinjiang, is the hero of the original book Criminal Psychology, and also the best graduate of Yongchuan University's (Virtual) Psychology Department in recent ten years.

All his temperament comes from being refined to the extreme by the deepest darkness of human nature. He is a calm, gentle and strong young man, cold, sharp and gentle, and often does not play cards according to common sense; Very strong, very kind, calm and calm.