Tiānzhùbáimáoniú de wěi máo zhēnguì, yòngyú zhìzuò xìqǔ dàojù.
Tianzhu white yak tail hair is prized and used for opera props.
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culture
Tianzhu, a Tibetan autonomous county in Gansu, is the only place on Earth where white yaks occur as a stable breed. Historically the tail hair was tribute goods to the Qing court.
