People who don't believe don't know what they can do-Confucius is sincere and Heaven is also; If you think sincerely, you will learn from others-Mencius' honesty is the foundation of being a man-Lu Xun once said, but it is difficult to recall. Story: A promise is a promise, and a letter is a letter.

Follow-up: Please explain the meaning of commitment.

Follow-up: There is also a migration letter.

Answer: The promise is worth 1000 dollars. Metaphor means keeping your word and keeping your credit.

Follow-up: establish prestige by making people move wood, which means to set an example and convince the public by some means.