Events of GTA Online
The Diamond Casino Heist
Zhao is first seen accompanying Georgina and Huang along with Pansy to Mirror Park, where they meet Lester Crest and the online protagonist in order to persuade them to rob the Diamond Casino on Georgina's behalf.
After that, Zhao and Pansy are not seen again. Once the online protagonist purchases an Arcade, Huang again accompanies his boss to visit the place, but Zhao and Pansy are not present. Huang mentions that they stayed at The Richman Hotel, also revealing their names.