On traditional national festivals such as the Spring Festival or jumping slopes, wedding celebrations, folk entertainment and other occasions, the Miao people will play long music to add to the fun. It also often forms a wind and percussion ensemble with folk instruments such as suona, gongs, cymbals, and drums, which are called "Sala" by the Miao people, adding to its joyful atmosphere.

When playing Changji, place the tube vertically, hold Changji with both hands, with the left hand on top, the ring finger and middle finger simultaneously press the fifth and sixth holes of the two tubes horizontally, the index finger press the seventh hole of the left tube, and the thumb press the back hole of the left tube; With the right hand down, the little finger, ring finger, middle finger, and index finger simultaneously press the first, second, third, and fourth holes of the two tubes. With two pipe whistles in his mouth.

The double tube of Changji is made of two bamboo tubes of the same size and length bundled side by side. Each tube is equipped with a core and a whistle, and has a common gas card.