Lee Sun-fung is renowned for adapting literary classics for the silver screen. To commemorate the seventh anniversary of the Union Film Enterprise known for producing quality films and co-founded by Lee, Human Relationships is adapted from writer Ba Jin's novel into film. The Yiu family moves into a manor. Mrs Yiu, while frustrated by the way her step-son is spoiled by her husband and mother-in-law, develops a friendship with a kid (Michael Lai) who steals flowers from the mansion's garden. She later learns that he is the son of the place's former owner whose downfall at middle age is the result of being spoiled when young. Lai was only a child but gained a foothold among seasoned veterans like Cheung Wood-yau, Ng Cho-fan and Pak Yin.
| Actor | Role |
|---|---|
 Michael Lai Siu-TinYang Zhaohan | Yang Zhaohan |
 Ng Cho-FanYang Mou-Chi | Yang Mou-Chi |
 Pak YinMan Yun-Wa | Man Yun-Wa |
 Cheung Wood-YauYu Kwok-Leung | Yu Kwok-Leung |
 Wong Man-LeiNot listed | Not listed |
 Leung Chun-MatNot listed | Not listed |
| DDo PingNot listed | Not listed |
 Lee Yuet-ChingNot listed | Not listed |
 Fung MingNot listed | Not listed |
 Wong Cho-SanNot listed | Not listed |
 Shek SauNot listed | Not listed |
| YYeung Yip-WangNot listed | Not listed |
 Lee Pang-FeiNot listed | Not listed |
 Ko Lo-ChuenNot listed | Not listed |
 Yung Yuk-YiNot listed | Not listed |
 Tong Kim-TingNot listed | Not listed |
 Go ChiuNot listed | Not listed |
 Ma Siu-YingNot listed | Not listed |
| CChan Chui-BingNot listed | Not listed |
| TTai Sang-PoNot listed | Not listed |
 Helena Law LanNot listed | Not listed |
 Tang CheungNot listed | Not listed |