ZhōuYúdǎHuángGài

Traditional: 周瑜打黃蓋

fig. with the connivance of both sides / fig. by mutual consent / cf Wu patriot Huang Gai submits to mock beating at the hands of General Zhou Yu to deceive Cao Cao [[曹操]] before the 208 battle of Redcliff [[赤壁之戰|赤壁之战<Chìbìzhīzhàn>]]