If you get Qin, he may be the best culture leader in the game. The Chinese unique building screams for a culture victory. Since Qin is industrious protective, a culture game uses the two triats well, while they are less useful for general conquest games. Mao at expansive/protective isn't bad, although I would rather have industrious for a culture win.
So, I see Qin, I immediately think of culture victory, and Mao is also pretty good for it.
Best wishes,
Breunor