Lee Chih-Kai was one of seven young players on the gymnastic team in Gong Jheng Elementary School of Luo-Dong Township, Yilan County, Taiwan. "Jump! Boys" is the documentary movie about the training processes and the life stories of the gymnastic team. The movie was directed by Taiwanese director, Lin Yu-Hsien and premiered in 2005. Because of "Jump! Boys", Taiwanese people started to show the interest in Lee Chih-Kai and Taiwanese Gymnastics.