Tā / men / yí / ge / yuàn / dǎ / yí / ge / yuàn / āi / zhēn / shì / Zhōu / Yú / dǎ / Huáng / Gài

他们一个愿打一个愿挨，真是周瑜打黄盖。

They both willingly played their parts—it was truly a case of mutual consent.