 When Cao Ren led a several tens of thousands strong expedition force composed of infantry, cavalry and marines to attack the Wu general Zhu Huan, Chang Diao was tasked to launch a sneak attack on the island Zhongzhou, where the family members of the Wu soldiers lived.Wang Shuang followed Chang Diao into battle and they landed on Zhongzhou unopposed.At the time, Zhu Huan was busy fighting the main Wei army, so he left his subordinates to deal with Wang Shuang and Chang Diao after instructing them to set an ambush for the enemy.