He soon began a screenwriting career, firstly with TV series and soap operas, such as "Don't Look Now" (1981), before progressing to film scripts. He worked as part of a team, contributing to a variety of genres including romance, comedy, thriller, and crime. Wong had little enthusiasm for these early projects, described by film scholar Gary Bettinson as "occasionally diverting and mostly disposable", but continued to write throughout the 1980s on films including "Just for Fun" (1983), "Rosa" (1986), and "The Haunted Cop Shop of Horrors" (1987). He is credited with ten screenplays between 1982 and 1987, but claims to have worked on about fifty more without official credit. Wong spent two years co-writing the screenplay for Patrick Tam's action film "Final Victory" (1987), for which he was nominated at the 7th Hong Kong Film Awards.