The first scene: last night, the west wind withered the green trees, and I went up to the tall building alone and looked at the horizon; The second realm: the belt is getting wider and wider, but I don't regret it, which makes people haggard for Iraq. The third scene: looking for him in the crowd, suddenly looking back, people are there, and the lights are dim.

The first realm is standing, the second realm is defending, and the third realm is gaining. The first realm is determination and determination, and only with this condition will there be the second and third realms.

Mr. Wang Guowei extracted these famous sentences from the works of several great poets in ancient times to talk about the three realms of learning. The original meaning of this word, obviously, is mostly about the affairs of children all over the world. But Mr. Wang Guowei skillfully borrowed it to talk about the realm of learning. That's right. Very thorough.