Nanxiao is mostly used in Guangdong music and Cantonese opera. It is tuned according to the characteristics of Guangdong music and made according to the Yi anti-tune of Cantonese opera, which is different from the Xiao used in the north. Nanxiao has a loud and clear tone and rich changes, which is in line with the characteristics of Guangdong music such as the brisk rhythm and rich tunes. It plays an important role in the performance of Guangdong music. Although the production process of the Xiao is simple, there are many perceptual experiences that cannot be expressed in words during the production process, which requires the flute maker to understand. Excellent flute makers generally have many years of experience in making flutes, as well as profound musical knowledge and personal artistic cultivation. Good flute makers can open the holes by hand according to the player's playing habits and requirements, and the player can try to blow it many times, and repeatedly adjust and calibrate it until he is satisfied.