Hulusi (pinyin: hú lu sī), also known as "calabash flute", is a musical instrument of ethnic minorities in Yunnan. Hulusi originated in Lianghe County, Dehong Dai and Jingpo Autonomous Prefecture, and is mainly popular in Dai, Achang, Wa, De'ang and Brown. The Dehong and Lincang areas in Yunnan where ethnic groups live together are rich in local colors. It is often used to play folk tunes such as folk songs and agricultural songs.

Hulusi is gradually evolved and transformed from the "sheng" in the Central Plains. Sheng, with a long history, originated in the Central Plains and was later introduced to the southwestern minority areas.

The structure still maintains the legacy of ancient musical instruments. Its two auxiliary pipes do not open sound holes, like the ancient Xiao, and can be used to produce continuous fifths. However, its director has opened 7 sound holes, which is very similar to the later Xiao and Di, showing its radicality in history.

After the founding of the People's Republic of China, Chinese folk musicians carried out continuous reforms on the cucurbit silk. In 1958, the Yunnan Song and Dance Troupe first expanded the vocal range to 14 tones. Some literary and art groups in Beijing have made two new types of cucurbit silk. Among them, the six-hole cucurbit flute can play single tone, double tone, single melody plus continuous tone and two harmonic melody plus continuous tone. It not only maintains the unique timbre and style of the original instrument, but also increases the volume, expands the sound range, and enriches the sound color and expressiveness.

Hulusi is often used to play folk tunes such as folk songs and minor tunes. It is most suitable for playing melody and lyrical music. "Phoenix Tail Bamboo under the Moonlight" and "Love and Love" have become its representative classic pieces. Hulusi is the most popular among the people of the Dai and Achang ethnic groups. It is a musical instrument for entertainment. During festivals, whether it is rowing a dragon boat in the river or putting "gaosheng" on the riverside, or "running" or "running" in the square. In the bamboo building, drinking and feasting, you can hear the beautiful voices of young men and women expressing affection or people walking on the road and working in the fields, and often blowing the cucurbit silk, which adds a lot of joy to people's lives.