Who can outline the characteristics of various schools of guzheng in detail, especially Hakka guzheng?

There are several schools of China Zheng: Shandong Zheng, Henan Zheng, Shaanxi Zheng, Zhejiang Zheng, Chaozhou Zheng, Hakka Zheng, Fujian Zheng, Inner Mongolia Zheng and North Korea Zheng.

Hakka guzheng has a long history, which is spread in Meixian, Tai Po and other Hakka areas in Guangdong. Guangdong Hakka music, also known as Han music, is influenced by local styles and dialects, forming an elegant, quiet, beautiful and euphemistic style. Representative tracks include "Water Lotus" and "Rain in the Night at Bajiao Window".

Chaozhou Guzheng is mainly spread in Chaozhou, Guangdong Province, forming unique tunes such as light six, heavy six and lively five. Music is rich and unique. Its representatives are Guo Ying, Su Wenxian and Lin Maogen. Representative repertoires include "Western jackdaw in the West" and "Qiu Si Song".

Shandong guzheng tunes are mostly in gong mode, consisting of eight boards. Its playing style is simple and elegant, with strong local characteristics in Shandong. The representative tracks of this Zheng school are: Autumn Moon in Han Palace, Four-piece Brocade, One World, Beauty's Homesickness and so on.

Henan Guzheng was introduced into Henan from Qin Zheng and blended with local folk music, which developed into a famous Zhongzhou ancient song in later generations. Characterized by deep passion. In the 1920s, Wei Ziyou of Suiping first introduced Henan Guzheng, and inherited more than ten pieces of music, such as Little Hand, Guan Ju, Great Harmony in the World and Fishing Boat Singing Night.

Zhejiang Zheng School is popular in Hangzhou. Most of his music is transplanted pipa, which is lyrical and dramatic. When playing, the techniques of kneading, singing, sliding and pressing of the left hand of the traditional Zhejiang Zheng school are simple, and only some modifications are made to the melody, which is just right and not exaggerated. Representative plays include "Mountains and Rivers" and "Your Legend".

Shaanxi Zheng School is a school revived in recent years. Zheng music involves a variety of operas and music, both tragic and ups and downs, and passionate and generous "heroic songs" of Qin opera. There are also "sad sounds" with Qiang music, such as weeping, lingering drizzle and euphemistic sadness.

Fujian Zheng School was only discovered in 1970s, and rarely circulated. Some of its music and music types are similar to Chaozhou and Hakka Zheng music styles, and some belong to Nanzheng School with the same song and different names. Most music is smooth and slow.

Inner Mongolia Zheng has only 10 strings, which are mostly used to accompany folk songs and pastoral songs.