I think you are right. I was amazed that "Three Hills" is not in the HKFA, being a SB film directed by Cheng Kang and with that cast. Also I see that Tien Niu ("Three Hills") has the chinese alias of Nau Nau ("Gambler's Delight").

so I think Tien's entry is not correct.
BTW, May we use your promo poster as alternate poster of this movie?
So, if nobody stops me in
15 days I will merge:
Three Hills (1979)
三山五嶽人馬
Word by Word: Three Mountain Five (unknown) Person Horse
Country: Taiwan
Genre: Romance
Cast
Danny Lee Sau-Yin
Chung Wa
Ngaai Fei
Wong Chung (1)
Tien Niu
Shirley Yu Sha-Li
Chong Lee
Chan Ping (2)
Ng Hong-Sang
Keung Hon
Wong Ching-Ho
Shum Lo
Chan Shen
Yeung Chi-Hing
Yau Chui-Ling
and
Gambler's Delight (1981)
流氓千王
Alias: Anxious to Return
Country: Hong Kong
Genres: Crime Comedy
Director
Ching Gong
Script
Lee Wing-Cheung
Ching Gong
Sze-To On
Action Director
Tony Ching Siu-Tung
Producer
Sir Run Run Shaw
Cast
Chan Ping (2) ... Madam Jin, Goldfinger
Chung Wa ... Sha Tung
Danny Lee Sau-Yin ... Dragon
Ngaai Fei ... one of Sha Tung's friends
Shirley Yu Sha-Li ... prostitute
Nau Nau ... Niu Niu
Wong Chung (1) ... 3rd brother
Shum Lo ... Dragon's cheating expert
Chan Shen ... Madam Jin's thug
Yeung Hung (1) ... killer
Chow Kin-Ping (1) ... Zhou
Lam Yeung-Yeung
Yau Chui-Ling
Wong Ching-Ho ... one of Sha Tung's friends
Lun Ga-Chun ... one of Sha Tung's friends
Ka Wa ... ruffian at acrobatic show
Keung Hon ... ruffian/Madam Jin's thug
Ng Hong-Sang ... ruffian/Madam Jin's thug
Alan Chan Gwok-Kuen ... ruffian
Yeung Chi-Hing ... bank clerk
Wang Han-Chen ... casino manager
Wan Leng-Gwong ... Shing, casino manager
Wan Seung-Lam ... Madam Jin's thug
Fung Ging-Man ... Madam Jin's casino manager
Lui Hung ... extra
Mama Hung ... extra
Lui Daat ... extra
Cheung Hei ... extra
To Wing-Leung ... extra
Fong Yuen ... extra
Ting Tung ... extra
Production Company
Shaw Brothers
Assistant Director
Lee Wing-Cheung