Complex sentence: In the original, Chow Yun-Fat's character had been killed off and thus, Chow did not return for the sequel "The Bund II" except for a brief flashback cameo appearance.
Split into simpler sentences: In the original, Chow Yun-Fat's character had been killed off. He did not return for the sequels "The Bund II", except for a brief flashback cameo appearance.