How did Lu Su change people in the old version of Romance of the Three Kingdoms?

Time factor, shooting conditions, etc.

1. The shooting of Romance of the Three Kingdoms lasted five years from 1990 to 1994. Due to the long shooting cycle, many actors have limited schedules and cannot participate in shooting for a long time, so actors change frequently.

2. The shooting conditions of Romance of the Three Kingdoms are rather difficult. Without modern computer special effects and studios, the scenes are all real shots. In order to truly depict the characters of the Three Kingdoms, actors need to have high basic skills, which leads to the substitution of people.