A Chinese drama that touches on sensitive topics including police corruption won the best picture at the Asian Film Awards Monday, while Japan's Takeshi Kitano scooped the best director gong."Mystery", directed by Lou Ye, which reportedly upset Chinese censors for dealing with controversial issues such as the behaviour of the country's new rich, also took home the best newcomer award, won by actress Qi Xi.The social satire was Lou's first film after he was banned from film-making for five years for showing politically charged love story "Summer Palace" at the Cannes Film Festival without government approval in 2006. "I am very happy because this (latest film) project has run into some troubles before, so this is a recognition for us," Lou told AFP after winning the award at a glitzy ceremony in Hong Kong.He said he would continue addressing social issues through his films despite the pressures he has faced. "I just want to concentrate on making films.... Movies and society cannot be separated," the director said.Chinese media said censors demanded Lou cut the violent ending in "Mystery" where the male lead bludgeons a garbage collector to death with a hammer. He refused until a compromise was reached and he agreed to darken the scene.