Mou, 32, won both overall champion and championship for female contestants with height under 167 centimeters at the competition.
She also became China’s first female athlete to win a membership to the International Federation of Bodybuilding and Fitness (IFBB).
Mou told US magazines after winning the competition that her motto was “realize dreams and never give up.”
The competition was established in 1989 by Austrian-American movie star and politician Arnold Schwarzenegger, who is also one of the most important figures in the history of bodybuilding. The influence of the competition is second only to the Battle for the Olympia.