Riding a Donkey into Beijing, Starting with an Aunt

Grandpa on the mountain taught him three things: Plant vegetables, practice swordsmanship, don't ask any questions. After his grandfather died, he went down the mountain and found that he couldn't use any of the three things. There is no land to grow vegetables, and there is no place to use the sword. It is impossible not to ask. So he rode a donkey and went to Shangjing. On the road, some people lied to him, some people beat him, and some people wanted to kill him. He is not angry. Grandpa said that the snake on the mountain does not bite, it is you who stepped on it at the door. He just doesn't know, Whose door will my sword trample on?