Lonely Chen Can represents withdrawn, taciturn, lacking desire and self-motivated.
Lonely Chen and widowed Su are an evil god in the eight characters. The so-called supernatural evil refers to some heavenly stems and earthly branches who meet certain conditions in the eight characters.
The book says that "men are afraid of loneliness and women are afraid of widowhood". It means that men are afraid of life on lonely days, and women are afraid of life at night.