Qīngchàng bǐ quánchǎng yǎnchū gèng kǎoyàn yǎnyuán de gōngdǐ.
Singing a cappella tests a performer's foundation more than a full staged performance.
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清唱 (literally 'pure singing') is a traditional form of Chinese opera performance without costumes, makeup, or stage props. It is used to demonstrate an actor's vocal skill in its purest form.