A figurative situation where both parties are willing participants in a ruse or a deceptive arrangement, even if one side appears to be mistreated.

这事儿是周瑜打黄盖，一个愿打一个愿挨，咱们外人就别操心了。

The historical or literary military ruse from the Battle of Red Cliffs where General Zhou Yu staged a beating of Huang Gai to deceive Cao Cao.

在赤壁之战中，周瑜打黄盖的苦肉计起到了关键作用。