It is suggested that writing factions is to retell history, such as style characteristics, technical characteristics, representative figures, historical evaluation and so on.
Shaanxi, Henan, Shandong, Chaozhou, Hakka (that is, Guangdong Hanle Zheng), Zhejiang, Fujian, Mongolia and North Korea are all very representative. They are also called the nine schools of guzheng. You can get to know them.