Superdan became a men's singles world champion before chinese "dog" new year arrived. National Sports Bureau Officially affirmed Lin Dan as a World Champion after he had got men's single champion of the Invitational World Cup. At the same time Xie Zhongbo and Zhang Yawen also were regarded as mixed doubles world champions. World Cup's champions are looked the same as olympic champions and world championships' champions in China. The world cup returned after it was closed down in 1997. "The champions of Invitational world cup must be recognized by National Sports Bureau as world champions becouse of so many years of cancelling." Li Yongbo said. Lin Dan said:"I look on National Sports Bureau's recognizing as a kind of encourager, and being world and olympic champion is my "biggest" aim in the future "