完璧归赵 (wán bì guī Zhào): lit. to return the jade annulus to Zhao ; fig. to return something intact to its rightful owner

lit. to return the jade annulus to Zhao ; fig. to return something intact to its rightful owner

Lin Xiangru got the jade back to Zhao intact against a bad-faith trade. For returning something valuable unharmed.

A Chinese idiom (成语)