He directed two of three parts, one with Veronica Yip as a nurse who sees dead pop stars, and Anita Yuen interviewing a demon.

His next effort, Daze Reaper, was a Category III exploitation film, based on a true-crime story about a prison guard who turns to crime.

He also turned to comedy with Teaching Sucks, about two Hong Kong teachers played by Anthony Wong and Jan Lam.

In 1998 Wilson co-wrote and directed his biggest cult hit at the time, Bio Zombie, which was influenced by Dawn of the Dead and takes place in a shopping mall, where a small group of misfits bands together in order to survive.

Yip next directed the 1999 crime-drama Bullets Over Summer, starring Francis Ng and Louis Koo as two detectives hunting a gang of deadly criminals who have to use a demented elderly woman's (Helena Law Lan) apartment for surveillance.

Other films include the science-fiction-action story 2002, and the romantic comedies, Dry Wood Fierce Fire (with Miriam Yeung and Louis Koo) and Leaving Me, Loving You (with Leon Lai and Faye Wong).