Zhao Yunlan actually called out a sentence: Xiaowei - S1.E21

The Special Investigations group is unsure of what to do with Chief Zhao’s blindness. Shen Wei takes him to a friend who is a doctor. There is no discernable reason for it. Chief Zhao’s father tells him to stay away from Shen Wei. Zhu Hong tells him to come to a Flea Market for demi-mortals. Perhaps they’ll find a cure there.