铜钱

铜钱	tóng qián	copper coin (round with a square hole in the middle, used in former times in China)
铜	tóng	copper (chemistry) / see also 红铜 / CL:块
钱	Qián	surname Qian
钱	qián	coin / money / CL:笔 / unit of weight, one tenth of a tael 两