The new movie Looper stars Joseph Gordon-Levitt and Bruce Willis. It's due to open simultaneously in the US and China. Not all films get that coveting release plan but this film is different. It's the latest example of a Hollywood trend designed to break into the lucrative Chinese market. The Chinese government restricts the number of foreign films that get distributed in China each year. These co-productions are a way around that quota. But it's not always easy doing business there, as was seen last year when Christian Bale (who'd just wrapped shooting the Chinese film Flowers of War) tried to visit the blind activist Chen Guangcheng but was forcibly stopped by plain clothes policemen. We talk with a panel of experts about the potential challenges and rewards for filmmakers making movies in China.