Papermaking is one of the four great inventions of our country. This is a one-to-many in a sick sentence and should be changed to: Papermaking is one of the four great inventions of our country.

A famous saying about integrity in Mencius is: Being sincere is the way of heaven; being sincere is the way of man. If you are sincere and do not move, you have not yet existed; if you are not sincere, you have not moved. --"Mencius Li Lou Shang"

Meaning: Honesty is a natural rule, and the pursuit of honesty is the law of life. It has never happened before that someone who is extremely sincere cannot move others; if he is not sincere, he cannot move others.

Bai Juyi's poem: The beauty of April in the world is gone, and the peach blossoms in the mountain temple are beginning to bloom.