How many movies have Lai Wen-hsiung and Yao Pai Hsueh collaborated on?

They have worked on 2 movies together! Their first movie together was 天羅,飛沙,夕陽紅 (1976) while their highest rated movie together was The Invincible Kung Fu Trio (1977). They have not worked together since The Invincible Kung Fu Trio (1977).