What kind of person is Master Zhang when the grinder goes to town?

Master Zhang, a pencil sharpener, is a skilled, straightforward, serious, optimistic and confident person. The sharpener cleared his throat and said to the onlookers with a smile, each knife is ten yuan. If you don't grind well, you don't charge a penny, and then you pay for a knife. "I can see that the pencil sharpener is cheerful and refreshing. The pencil sharpener quickly took out four grindstones from the waxy canvas bag. After all the procedures were completed, the sharpener grabbed a few hairs and put them on the blade. The hair was cut off with a hard blow. It can be seen that the pencil sharpener is superb.