Wai Qiang Zhong Gan (Outwardly Strong but Inwardly Weak)
The Earl of Qin was attacking the Marquisate of Jin… After defeating it in three battles, he reached the place called Han.
Marquis Jin said to his minister Qing Zheng, "The enemy has now entered deep into our territory. What shall we do?"
"It was you yourself who invited their incursion into our domain. There is nothing we can do now," replied Qing Zheng.
The Marquis reproached Qing Zheng for his imprudence and sought help from divination to decide who would be the Right Guard in command of the charioteers. The oracle was in favour of Qing Zheng, but the Marquis refused to appoint him for that post. Instead, he asked Bu Yang to take command and Jia Putu to be the Right Guard; the latter, however, after taking over the command, chose to use small chariots drawn by teams of four horses brought from the State of Zheng.
Seeing this, Qing Zheng pleaded to the Marquis, "Our forefathers, whenever they dealt with an important affair like going to war, only used horses of our own breed. Such animals are native-born and know the mind of the native riders; they obey their orders and are familiar with the local roads; therefore, no matter how you use them, they will always meet your purpose. Now we are using alien-bred horses in the war; they will be apprehensive and go against our intention. And apprehension causes uneven breathing, disturbs the spirit, swells the chest, quickens the circulation of the blood and irritates the nerves. The horses may look strong but they are actually weak; they will find themselves lost, not knowing which way to turn - going forward or backward, this way or that way. I am sure you will regret your decision." The Marquis, however, refused to listen to him.
On the day of Renxu, the Qin and the Jin troops fought at Han. And it turned out that Jin's war horses could only go round and round, bogged down in deep mire. The Marquis then cried to Qing Zheng for help.
"You were adamant in refusing to listen to my remonstration and you disobeyed the oracle, so you have brought about your own defeat. Why should you now try to escape your fate?" Qing Zheng said, and left the Marquis to himself.
Liang Youmi was then driving the chariot for Han Jian, and Guo She became the Right Guard. They encountered the Duke of Qin on the way and were going to stop him when Qing Zheng came to ask them to go and save the Marquis. So, they missed the chance of capturing the duke.
In the end, Qin captured the Marquis and its army returned to their own state in triumph.