Cao Cao's young son Cao Chong was only eight years old at the time, but he came up with the idea of having the elephant put into a boat and marking the water line on the side of the boat, then filling the boat with stones after taking the elephant off.
曹操的幼兒曹沖當時只有八歲，卻想到叫人把大象放到一艘船上，在水淹到船邊的地方做上記號，再把大象牽下船，搬石頭到船上。