Whose name did the Taoist priest write on Su Mei's hand?

In the play, the Taoist priest wrote the name "Guoyu" in Su Mei's hand.

In the TV series Crime Without a Certificate, Yan Liang hopes to know more about his father through Guo Yu, but Guo Yu is just a pony and doesn't know what Yan Liang said. So Yan Liang found a Taoist priest, hoping to find out what Guo Yu knew through the Taoist priest. The Taoist wrote Guo Yu's name on Napoleon wrasse's hand and told Yan Liang what Guo Yu knew.

Crime without a license is a crime suspense online drama jointly produced by iQiyi and Huaying Xinrong Film, directed by Lu Xing and co-starred by Qin Hao, Deng Jiajia, Yao Lu, Dai Xu, Wang Zhen and Li Ning.