Which trick did Su Shi use to cleverly refuse a friend's intercession?

Two brothers, Su Dongpo and Zisu, are officials. A friend who has a deep friendship with the brothers came to visit and wanted to ask them to help find a job in the yamen. This person went to see Su Ziyou first, and then came to see Su Dongpo after disappointment. Su Dongpo knew his purpose and told him a joke story before the man got down to business.

Su Dongpo said: Once upon a time, there was a man who, because of his poor family, could not make a living, actually began to dig graves and rob tombs. When he dug a grave, he saw a naked man. The corpse said to the grave digger, "I am Yang Wangsun of the Han Dynasty, famous for burial. Never heard of it? " What can satisfy you in the grave of a naked man? "The grave digger had to dig another grave with difficulty, entered the grave and found that the owner was a king.

The king said to the grave digger, "I am Emperor Wen of Chinese. Before his death, I left an imperial edict that all my funerary objects should not use gold and silver utensils, but only pottery. There is nothing of value here that can't meet your requirements. " After coming out of the tomb of Emperor Wen of Han Dynasty, the grave robbers were very happy to see the two tombs connected together, and immediately began to dig from the hole on the left.

When I entered the grave, I saw a man say, "I am Boyi." I was so hungry that I died in shouyangshan. There is nothing here, so I can't meet your requirements. " The grave digger then sighed: "I spent so much effort to dig the grave, but found nothing." I might as well dig the grave on the right again, or hope to dig something from there. " Boyi said to him, "I advise you not to dig that cave tomb." You see, my body is thin and ugly. My brother Shu Qi also starved to death. His situation is worse than mine. "

When Su Dongpo's old friend heard this, he knew that he didn't mention looking for a job and said goodbye to Su Dongpo according to etiquette.

Obviously, this so-called story of grave robbers digging for treasures was deliberately made up by Su Dongpo. In fact, he politely advised: don't bother me, I Su Dongpo really can't help you find a job in the yamen. He also hinted not to go to Sue, and he couldn't help him.

With this trick, Su Dongpo skillfully got rid of a troublesome thing that might cause trouble, achieved his goal, and did not have a hard time with his old friends.