I am Jackie Chan, 1998 t.p. (Jackie Chan) p. 3 (real name Kong-sang Chan; b. Apr. 7, 1954 in Hong Kong)
Internet movie database, April 26, 2001 (Jackie Chan; birth name: Kong-sang Chan; b. April 7, 1954, Hong Kong; also credited as Jacky Chan, Yuen-Lung Chan, Long Cheng, Sing Lung)
Reply from the actor's office to query by HKCAN, Apr. 22, 2005 (the form Cheng Long is explicitly preferred for his hdg. over Jackie Chan by the actor)