Zhao Yunlan asked Shen Wei for credit in return - S1.E15

Guo rescues a clueless man on the street who says he needs to go to the address of the Special Investigations Unit. It turns out to be the Regent from the Underground and before he can reveal secrets about the Black Cloaked Envoy, Chief Zhao interrupts him and takes him into his office to discuss the issue privately. It appears that a very important book is lost and the Black Cloaked Envoy is very angry.