1- KING HU is the only director of the movie.
2- TSUI HARK, TONY CHING and RAYMOND LEE are only executive directors (or "acting directors") 執行導演 of the movie.
3- ANN HUI and ANDREW KAM did not do nothing in the movie.
4- TONY CHING and LAU CHI HO were the only action directors of the movie, without YUEN WAH.
Mr. Bearserk sent me the irrefutable proof:

Sorry the picture quality is not good.

For the moment I only added the executive directors.
As I think this is a very controversial topic, I will wait 30 days before removing ANN HUI, ANDREW KAM and YUEN WAH.