Bamao Village, Xijiekou Town, Shilin Yi Autonomous County, Kunming City, Yunnan Province is famous for its big three strings, and is known as the hometown of China’s great three strings. "Everyone's feet will itch when they hear the sound of the flute sanxian."

The big sanxian of the Yi nationality is composed of the resonance tube, headstock, piano rod, peg, bridge, tie-string and strings. , the total length of the piano body can reach 180 cm to 200 cm. The Yi nationality has a long cultural tradition, and folk songs and dances have been held for a long time. During traditional festivals such as the Torch Festival, Flower Arranging Festival and March Festival of the Yi Nationality, people all dress up and gather together to sing and dance. The men danced while holding the big three strings, while the women danced while clapping their hands and using their feet on the ground.

Yi dance not only has a long history, but also has a wide variety of dances. Each branch has different dances, and even the same branch has different dances due to different places of residence. The Sanxian Dance of Sani is the most popular collective dance in the Shilin area. The basic action is three jumps and one kick, so it is also called "three-step music". Dasanxian has a cheerful rhythm, bold dance and warm atmosphere. It is a good opportunity for young men and women to meet the opposite sex, express their love, and choose a mate and make friends. Therefore, young people have a soft spot for it. The rhythm of the small sanxian is slow and gentle, and the style is harmonious. It is suitable for the elderly to dance, so it is also called "the old man's dance".

During the Torch Festival, people light bonfires, light torches, play the big three strings, and sing indulgently. The torches are like stars descending on the ground and flying like fire dragons, which is dazzling. The whole festival was crowded with people, and the atmosphere was warm and cheerful.

As a traditional musical instrument, the big sanxian has been handcrafted by craftsmen from various villages in Shilin since ancient times. The old man Bi Guangming of Dabamao Village is famous for making big sanxian, and he is known as "Papa Sanxian". Bi Guangming's grandfather was a famous "master carpenter" in Sili Baxiang, and he learned carpentry and construction skills since he was a child. Because he loves music and musical instruments, Bi Guangming has been making big sanxian since he was 16 years old. The sanxian, yueqin, sanhu, etc. he made by hand, with elegant sound quality and exquisite carving, are deeply loved by the people of Yi township.

"Sani doesn't dance, he comes to the world for nothing." Since ancient times, the people of Sani have been known for their enthusiasm, boldness and ability to sing and dance. During the slack season, when night falls and the moon is in the sky, young men and women from Sani will go out of their homes one after another, lighting a bonfire in the open space in the middle of the stockade, dancing cheerfully, singing bursts, violin and flute. The long, unique and rich artistic atmosphere makes people intoxicated and lingering.