How are the dizi and xiao made?

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A short educational film, taken from the archives of the Asian Music Circuit's Museum of Asian Music.

The dizi (Chinese: 笛子; pinyin: dízi) is a Chinese transverse flute. It is also sometimes known as the di (笛) or hengdi (橫笛), and has varieties including the qudi (曲笛) and bangdi (梆笛).

The xiao (simplified Chinese: 箫; traditional Chinese: 簫; pinyin: xiāo; Wade--Giles: hsiao) is a Chinese vertical end-blown flute. It is generally made of dark brown bamboo (called "purple bamboo" in Chinese). It is also sometimes (particularly in Taiwan) called dòngxiāo (simplified Chinese: 洞箫; traditional Chinese: 洞簫), dòng meaning "hole."