"Hei Bou",means the gem of opera (Cantonese Opera) in movie, and it was indeed true, especially when comes to Yam and Pak collaboration.
Though has long being considered as Cantonese Opera classic, but it has been reported that Miss Pak Suet Sin seemed doesn't fond of it very much, as the plot appeared to be abit vulgar and coarse to her .
However, when comes to performance, no one would ever doubt the fantastic chemistry between this legendary screen couple.Delicate Legacy - Love of Three Smiles (1974)
This version, starring both Long Kim Sung and Mui Suet Si, have been an unanticipated blockbuster in 70s, which was the dawn era of opera movies, and resulted their subsequent collaboration in Princess Chang Ping (1975), directed by John Woo, and marked the finale of Cantonese Opera in silver screen.
Both Lung and Mui are the famous and acclaimed apperentice of Yam and Pak, being trained professionally by both legends in the "Baby Phoenix Sings" Troupe since 60s.
Though it was a remake of their teachers' version 20 years ago (with some refinement made to the script), but it seem that Lung and Mui have demonstrated their distinctive quality, while inheriting the essence of Yam-Pak's art and characteristic.
Just for your information, both Lung and Mui are still active in opera stage till nowadays, which is really hard to come by.