Different Love (1976)

Brigitte Lin is Sung Hsiao Yu, a young girl in love with Wen Hsing Yu (Charlie Chin), a botanist who's trying to cross-fertilize flowers to create a perfect breed of rose. But Hsing Yu has a rival, Tsui Wen Lun, who despises Wen Hsing Yu for being on better terms with his father AND capturing Hsiao Yu's heart. But when Wen Lun gets in with Hsiao Yu's father, that may be all she wrote. Can Hsiao Yu safely choose her preferred man - Wen Hsing Yu - if it ends up leaving her father in trouble? Or will Hsiao Yu sacrifice love for family?