In November, the enemy reached the Fei River in Eastern Jin and began to set up defenses at the riverside. Across the river was Eastern Jin's troop. As there was a great disparity of strength, Xie and his comrades in arms had hardly any hope of victory if they started a face-to-face battle. Then they had an idea. They sent a herald to take a message to Fu Rong, the king's major general, "You are setting up defenses along the river, so it is quite obvious that you are planning for a long war. But as you are far from your country and supplies cannot be timely guaranteed, you are no doubt putting yourselves in a very disadvantageous situation. Why don't you let your troop retreat a few hundred yards so that we can cross the river to fight a decisive battle with you?"

This message was taken to King Fu Jian. He laughed and said, "How silly those generals are! How dare they wade across the river to fight against a troop of 870,000 men! They surely overrate themselves. Let's retreat so that they can come across. But we will return and wipe them out when they are in the middle of the river."

The retreat started. In a few seconds, there suddenly came a roaring cry from behind, "The king is defeated!" As the purpose of the action had not been properly declared, many men mistakenly believed that they were truly defeated. Therefore, they ran faster until the whole troop became beyond control. The Jin's troop immediately crossed the river and attacked the enemy from behind. General Fu Rong attempted to give a counterattack, but it was too late. His troop was already in a thorough confusion and no one would hear his order. This invading Titanic was at last sunk by a much smaller group of fighters.

King Fu Jian's mistake lies in the fact that he only knew that an army in water is easy to defeat. Yet, he should have also known that when two armies confront each other, the one who first retreats tends to lose.