以夷制夷
yǐyízhìyí
ㄧˇ ㄧˊ ㄓˋ ㄧˊ
- 1to use foreigners to subdue foreigners (idiom); let the barbarians fight it out among themselves (traditional policy of successive dynasties)
- 2Use Western science and technology to counter imperialist encroachment. (late Qing modernizing slogan)