In 1982, with the support and help of the Music Research Institute of the China Academy of Arts in Beijing and the Beijing Wind Instrument Factory, the reform and exploration of the small muffled flute was carried out, and the five-hole (the first four and the last one) the small muffled flute (range g1-e3) was successively made. ) and the plus key seven holes (the first six and the last one) the small muffled flute (range f1-f3).

The plus-key seven-hole small muffled flute adds two buttons, which solves the difficulty of not using enough fingers to play with one hand. A flute membrane hole is added at the bottom of the pipe body to improve the majesty of the bass, and the gap between the whistle and the pipe body A tuning tube is added, and a flute hook for auxiliary flute holding is set at the end of the tube. The reformed muffler not only maintains the timbre and volume of the folk muffler, the traditional one-handed flute playing method and the performance skills of muffle, open, fan and close, but also ensures the intonation, expands the range to two octaves, and can transpose. , making it a solo instrument full of Yi characteristics, and used for the ensemble of national bands. In 1982, at the first "Nie'er Music Week" National Instrumental Music Concert in Yunnan Province, he played the solo "The Joy of Autumn Harvest" composed by Li Hanjie with the keyed seven-hole muffled flute and received a relatively ideal artistic effect.

In 1986, the Song and Dance Troupe of Chuxiong Yi Autonomous Prefecture in Yunnan Province was reformed into an eight-hole small muffled flute. The tube body is made of Phoenix tail bamboo, the tube length is 12.5 cm and the inner diameter is 0.7 cm. The tube body has eight circular sound holes (the first six and the second two), the back holes are the fourth and seventh holes, and the front is the eighth hole. The hole is 1.5 centimeters away from the upper end of the pipe, and a plastic sliding frame with a pull ring is also set at the end of the pipe. During the performance, the little finger can be used to hook the pull ring to complete the boring and releasing action. On the basis of maintaining the original timbre and traditional techniques of muffler and release, this kind of muffler can be played with both hands.