http://hkmdb.com/db/movies/view.mhtml?id=6237&display_set=eng
Strange entry:

Action Directors
Chu Ko
Phillip Kwok Chun-Fung
Lu Feng
Chiang Sheng (1)

and:

Assistant Action Director
Chiang Sheng (1)
Lo Yuen-Ming

Maybe the second entry is not Assistant action director but Assistant director?

I was who added this strange info thanks to Mr. Klein's screenshots. You are right, sorry and changed.