Adam Cheng, Jelly Lin, Stephen Chow and Karen Mok pose for a selfie at a press conference in Beijing on Jan. 18, 2016, to release the promotional song "You Are the Best in the World" for Chow's new film "Mermaid." The song is Cheng and Mok's cover of the popular old song from the 1983 TV series "The Legend of the Condor Heroes." [Photo/China.org.cn]