Lv Buwei (235 BC), the prime minister of the Qin Dynasty, was surnamed Jiang and named Lu. Famous businessmen, politicians, thinkers, bibliographers and scholars at the end of the Warring States period. Later, he was the Prime Minister of Qin State and a native of Puyang (now Puyang, Henan Province). And assisted the alien (Qin Zhuang Wang Xiang, the father of Qin Shihuang) to ascend to the throne. Lv Buwei was a big businessman in Yangzhai (now Yuzhou City, Henan Province). His hometown is on Dalu Street in the south of the city. He ran around, buying at low prices and selling at high prices, so he accumulated thousands of dollars of wealth. He is famous for his "strange goods can live in". He was once the prime minister of the State of Qin, and organized his disciples to compile the famous Lu's Spring and Autumn Annals, namely Lu Lan. There are 3000 guests. It is also a representative figure of sage thought. Later he was killed by Qin Shihuang. The idiom "Carving a boat for a sword" is selected from Lu Chunqiu Cha Jin.

Carving a boat for a sword (Warring States Period) Lu Chunqiu. The Book of Tea (an anthology compiled by Lv Buwei in the Qin Dynasty at the end of the Warring States Period)

Some Chu people waded in the river and their swords fell into the water, so they grabbed their boat and said, "My sword fell off the boat." The ship stopped at the destination, and the Chu people jumped into the water from the marked place to find the sword. The boat did it (yǐ), but the sword couldn't. If you want a sword, it's not chaotic at all!