ㄓㄡˊzhōuyúㄉㄚˇㄏㄨㄤˊㄍㄞˋhuánggài

周瑜打黄盖
  1. 一個一個戰時藉故責打氣憤詐降鋪路取信比喻兩相情願 女朋友正是周瑜打黃蓋──一個一個」。

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[Chi4 bi4 zhi1 zhan4]