曲线救国 (曲線救國) qǔxiàn jiùguó

qǔxiàn jiùguó set phrase to secretly work for the enemy
Domain: Modern Chinese 现代汉语
Notes: Especially of someone who ostensibly collaborated with the Japanese during the Sino-Japanese war of 1937-1945; to secretly work for the Nationalists or against the Communists (CC-CEDICT '曲線救國')