In the Eastern Han Dynasty, there was a young man named Chen Fan who lived alone in a room and was filthy. Qin Xue, a friend of his father's, criticized him and asked him why he didn't dress up to meet the guests. He replied, "When a man is a man, he should clean up the world and settle down?" Qin Xue immediately retorted: "How can we sweep the world without sweeping a house?"

Hold the shaft: shaft: axle, which refers to the center and hub. Grasp the center and key of the operation of things.

Move with emotion: move with emotion: often; China people: Fight, fight; Ken: extended to key or key point. Metaphors often hit the nail on the head or get to the crux of the problem.

Hit the key: the key: the part that is easy to die, and it is the key to an important department or problem. It hit the fatal part.

Catch the thief and catch the king first: it means to catch the main enemy first in battle. Grasping the key first is also a metaphor.