HSK 6
背心
bèixīn名
sleeveless garment (vest, waistcoat, singlet, tank top etc)
爷爷夏天常穿白背心。
Yé ye xià tiān cháng chuān bái bèi xīn.
Grandpa often wears a white undershirt in summer.
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New in the HSK 3.0 word list at level 6.