Koudi
The koudi (kǒudí also spelled kou di) is a very small Chinese flute made from bamboo. It is the smallest flute in Chinese Flute family. Its original shape is from prehistorical instruments made with animal bone, while Koudi is made with wood, bamboo or PVC, which is very distinct with the original shape. It was invented in 1971 by dizi master Yu Xunfa.
A koudi. The large hole in the middle is the blowing hole, and the three smaller holes on the top are finger holes. The two open ends of the tube are also used, played with the thumbs.