How many movies have Lee Long-Koon and Ngai Hoi-Fung collaborated on?

They have worked on 3 movies together! Their first movie together was The Strange Hero Yi Zhimei (1967) while their highest rated movie together was The Cub Tiger from Kwang Tung (1973). They have not worked together since The Cub Tiger from Kwang Tung (1973). They are most known for their comedy films together.