The straight flute (pinyin: zhí tōng xiāo), also known as the notch flute, is a musical instrument of the Miao people. In Miao language, it is called exhibition pole, which means straight blowpipe. Also known as Zhanqingjiao in Hmong language, it means a notched blowpipe. Popular in Xingyi and Anlong in Guizhou Province, Longlin, Xilin, Napo in Guangxi Zhuang Autonomous Region and Guangnan and Funing in Yunnan Province.

The flute tube is made of bamboo, which is mostly made of locally grown water bamboo, which is called "digging" in the Miao language. The tube body has no joints, and both ends are transparent. The tube is 38 cm long, the outer diameter of the upper nozzle is 2.3 cm, the inner diameter is 1.7 cm, and the outer diameter of the lower nozzle is 2.1 cm and the inner diameter is 1.5 cm.

For solo, unison, ensemble or to accompany folk songs and dances. In the social life, jumping slopes or love life of young Miao men and women, mostly men play the flute, and women sing harmony. Although there is no fixed song, the soft and euphemistic tunes blown out seem to be singing a love song with rich emotions; in traditional Miao festivals On occasions such as weddings, funerals, or entertainment commemorations, the straight flute is often played with folk instruments such as Lusheng, Konoha, Saixiao, and Miao Sanxian, or accompanied by folk songs and dances. When two straight flutes are played in unison, those with the same or an octave difference are often used, commonly known as male and female flutes, which can complement each other or add flowers.

Traditional repertoires include "Minor", "Major", "Lifang", "Inviting Guests" and "Thanks".