What are the playing characteristics of the leading three strings?

Longtou Sanxian is the only special accompaniment instrument for Bai rap music "Big Ben Qu" and "Ben Qu". "Big Ben" is popular in Dali and Erhai, and has a history of hundreds of years. It has rich sounds. The traditional form of performance is that one person sings and the other person plays the lead singer with three strings. Now artists play and sing by themselves. "This song" is popular in Jianchuan area, and the performance form is one person playing and singing. Yang Dehong, an old farmer artist in Jianchuan County, was called "Qu Xian" by local people because of his superb playing and singing skills. The leading sanxian is also an indispensable accompaniment instrument for Bai young men and women to sing folk songs and tune. Playing strings is the main way for Bai youth to fall in love. During the "Around the Three Souls" Song and Dance Festival in Dali and the "Shi Baoshan Song Festival" in Jianchuan, Bai people put on holiday costumes to attend the party. At that time, the mountains were full of the sound of the three-stringed instrument, and the singing was intoxicating. Young men and women sing "Dali White Tone", "Erhai West Mountain White Tone" and "Jianchuan White Tone" and make friends and choose spouses. After the song is decided, they have to get to know each other and find a matchmaker to be their lifelong partners. The famous three-string solos are: Jianchuan Tune, Dashi Sanduan, Daban Shuiban, Baidiao, Dianbeitian Ridge Tune, Tongdian Baidiao and Baisanxian Tune.