寸土必争 (寸土必爭) cùn tǔ bì zhēng

cùn tǔ bì zhēng phrase fight for every inch of land
Domain: Modern Chinese 现代汉语
Notes: Quote: from 毛主席语录 Quotations from Chairman Mao Tse-Tung (Mao Zedong 1966, p. 22)