1. Different types: in the Tang Dynasty, there were mainly big Zheng, small Zheng and so on. In the Song Dynasty, the types of Zheng music gradually increased, and there were 13-string Zheng and 16-string Zheng.

2. Different skills: In the Tang Dynasty, Zheng music paid attention to the skills of singing, rubbing, sliding and shaking of the left hand, while in the Song Dynasty, Zheng music paid attention to the coordination of both hands and adopted new playing skills such as playing with both hands and fingering quickly.