Li Fugui thought, husband and wife are like two atoms:
They were far apart at first, but by chance they moved within the range of gravity and started to feel good about them.
If there are more accidental external forces and sufficient gravitational force between the two, they will get closer, and then they will enter the love stage.
When two atoms feel that their gravitational pull is strong enough to be separated, they will want to enter into marriage.
They think that this gravitational force will become stronger and stronger as they get closer to each other, but they don't know that when they get close to the extreme, they will repel each other. They are different individuals, destined to be unable to escape the shackles of nature. Therefore, a truly harmonious marriage lies in both parties wisely keeping the distance beyond the extreme. Otherwise, the closer they get, the more repulsive they will be, and one day the gravitational pull of the marriage will be repelled to nothing.