Investing as much as 80 million Hong Kong dollars, "Kung Fu Dunk" starring Jay Chou and Charlene Choi is now in the post-production phase. The promotional video was filmed on a street in Shanghai. Jay is transformed into an "urban knight", wearing a 10 catties (approximately 11 pounds) coat and performing a series of difficult and dangerous moves with ease. This is enough to impress many people. It is understood that it took nearly five hours to shoot the one-minute trailer. Moreover, the official claims that this trailer was not edited from the movie.