The idiom story about keeping one’s word is as follows:

1. The letter holding the pillar.

The definition is used to express keeping a promise.

There is a story about a man and his girlfriend who made an appointment to meet under a bridge. The man waited for a long time without seeing his girlfriend. Later, the water rose under the bridge, and the man hugged the bridge pillars (piers) and refused to leave the bridge. As a result, he drowned. Later generations think that although a man's foolishness is sad, his keeping his promise is praiseworthy. The story has been passed down to this day

The source is "Zhuangzi Taoju": "The young man and his wife lived under a beam. The woman did not come, and the water did not come, so she died holding the beam." "Historical Records of Su Qin": "Letter" For example, when Wei Sheng met a woman under a beam, she would not come and the water would not go away, so she died holding the pillar. "Li Bai of the Tang Dynasty wrote in his poem "Changgan Xing": "How can I go to the husband's platform if I always keep the letter holding the pillar? >

2. Standing tall for faith.

The story is that Shang Yang of Qin State presided over the reform with the support of Qin Xiaogong. At that time, in order to establish prestige during the Spring and Autumn Period and the Warring States Period, when wars were frequent and people were in panic. To promote reform, Shang Yang ordered a three-foot-long log to be erected outside the south gate of the capital, and made a promise in public: Whoever can move this log to the north gate will be rewarded with a reward of ten taels.

Onlookers. People didn't believe that such an easy thing could get such a high reward, so no one was willing to give it a try, so Shang Yang raised the reward to 50 gold. Under the heavy reward, there must be a brave man, and finally someone stood up and carried the wood to the north. Shang Yang immediately rewarded him with fifty gold. Shang Yang's move established prestige in the hearts of the people, and Shang Yang's subsequent reforms quickly spread in Qin. The country gradually became stronger and stronger, and finally unified China.

The source comes from Shang Yang's reform "Erect a tree as a letter" in Sima Qian's "Historical Records: Biography of Shang Jun": The order has been given but has not been issued, so as to fear that the people will not believe in themselves. A three-foot-long tree was erected at the south gate of the capital city, and anyone who could move to the north gate would be given ten gold coins. The people would be surprised and no one would dare to move. He said again: If there is a person who moves there, he will be given fifty gold coins to show his innocence. Pawn gave the order.

"Fifty gold will be given to those who can move"