高垒深沟 (高壘深溝) gāo lěi shēn gōu

gāo lěi shēn gōu set phrase a high rampart and a deep ditch
Domain: Idiom 成语
Notes: For example, in the Warring States period text 孫子兵法 “Art of War” by Sunzi, section 6 (tr. by Giles 1910, p. 45; Guoyu '高壘深溝')

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Truncated for common words