He saved half a year's salary to buy the engagement ring.
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culture
Also written 订婚戒指. Full form of 戒 is 戒指 (ring). DR (Darry Ring) popularized the 男士一生仅能定制一枚 (a man can only ever order one) marketing hook in China; 周大福 and 老凤祥 dominate the mass market.