What coin has chinese man on front and 100 on back?

The coin you are referring to is likely the Chinese 100 yuan banknote featuring a portrait of Mao Zedong on the front. However, if you meant a coin, it could refer to the Chinese 1 yuan coin, which features the image of a Chinese man (often representing various historical figures) on the front, but it is important to note that this coin does not typically have "100" on the back. The 100 designation is primarily associated with banknotes rather than coins.