From this website (in Chinese), 
click
culture.people.com.cn/GB/...59056.html

Somewhere near the end of the interview, it was noted that after fading off from the film industry about 17 years ago, Patrick Tam had gone to teach in a University in Malaysia, something related to filming.

He also mentioned that after this film, he would return to teaching (where his passion lies), instead of returning to direct the next film.