In ancient China, Shang Yang, a prime minister of the State of Qin highly regarded by the king, planned a political reform in 359 BC to boost economic growth. However, he feared the people would not trust the new authorities.
To build public trust, he had a ten-meter pole erected at the capital's south gate. He announced that anyone who carried it to the north gate would receive ten ounces of silver. The crowd was astonished, but no one dared to try. Seeing this, Shang Yang raised the reward to fifty ounces. Finally, a brave man stepped forward, moved the pole, and was promptly paid the promised sum, leaving the onlookers filled with regret.
Through this act, Shang Yang successfully established his credibility. His reforms were implemented, and Qin grew into the most powerful state. This story is later used to praise those who keep their promises.