A company wants to select two employees from Zhao, Qian, Sun, Li, Zhou and Wu to go abroad to discuss the project
During the selection, he noticed the following situation: (1) Wu and Qian cannot go together; (2) only when Sun goes, Qian can go; (3) if Li goes, Zhou also goes; (4) either Zhao or Li goes; (5) if the Qian does not go, Zhao cannot go either; (6) for some reason, Sun cannot go
Li and Zhou will go 