他山之石可以攻玉 [ㄊㄚ ㄕㄢ ㄓ ㄕˊ ㄎㄜˇ ㄧˇ ㄍㄨㄥ ㄩˋ; ta1 shan1 zhi1 shi2 ke3 yi3 gong1 yu4]
lit. the other mountain's stone can polish jade (idiom); to improve oneself by accepting criticism from outside
to borrow talent from abroad to develop the nation effectively
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