China's first Olympic gold medal winner in boxing, Zou Shimng, made his film debut in one of the summers biggest blockbusters, "Transformers: Age of Extinction. The film was mostly shot in China and it's government was more than willing to share their prized superstar, who display some of his talents in the film. China is already the world's second largest movie market and it's growing fast -- box office receipts topped $3.5 billion in 2013, up 28% on the previous year.
Still, China remains a tricky place for filmmakers to do business.
The government keeps a tight grip on foreign films that are shown in the country, requiring everything from preliminary script approval to sign off on the final cut. Foreign film releases are limited to 34 per year.
Making use of Chinese locations and actors helps Hollywood studios achieve two goals at once: Attracting local moviegoers, and building closer ties with officials.