shī​yí​cháng​jì​yǐ​zhì​yí

learn from foreigners to control them

师夷长技以制夷 師夷長技以制夷 shī​yí​cháng​jì​yǐ​zhì​yí
learn from foreigners to control them
Learn the superior technology of foreigners in order to gain control over them; a policy of modernizing China's defenses advocated by the scholar 魏源 wèi​yuán during the Qing Dynasty.

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