Niutouxun, a folk musical instrument of the Hui nationality, commonly known as "wow" or "mud flute" by the Hui people, is a small folk musical instrument made of yellow clay with strong adhesion and durability. It was called "xun" in ancient times.

In 1984, at the Ningxia Hui Autonomous Region Folk Artist Showcase, Ding Chengcai, an old Hui artist, played a piece of music with the flavor of the Hui people reciting the Koran with Niutouxun, which was unique and refreshing. However, due to the narrow range of Niutouxun, it cannot express fast tunes, so it is difficult to accompany and ensemble. In order to put Niutouxun on the stage, Ningxia musician Feng Huiyun developed a kind of Niutouxun with a conical mouthpiece, which is round on the top and pointed at the bottom, wide on the top and narrow on the bottom. From the original five sound holes to twelve sound holes. In this way, the fifth can be blown by the mouth, and the eleventh of the sound hole can be used to play and solo the general music of ancient and modern China and foreign countries. It has been put on the stage and is deeply loved by the Hui people.