1, see Article 57 of Pipe.
2. Guanzi is a book that records the words and deeds of Guan Zhong, a statesman and thinker of Qi State in the Spring and Autumn Period. Written from the Warring States to the Qin and Han Dynasties. When Liu Xiang compiled Guanzi, there were 86 articles, 76 of which were in this edition, and the rest 10 were only in the catalogue. Guanzhong Han nationality, the word Yi Wu, the word Zhong, also known as the famous politician and strategist of Qi in the Spring and Autumn Period.
3, Guan Zhong lost his father when he was young, his mother was in the hall, and his life was poor. He had to shoulder the burden of his family early. In order to make a living, he joined the army after doing business with Bao, and after many twists and turns, he was recommended by Bao as the minister of Qi, known as the first phase in the Spring and Autumn Period, and assisted to become the first overlord in the Spring and Autumn Period. So he said Guan Yiwu was a scholar. Guan Zhong's remarks were found in the Mandarin Chyi Yu, and another Guanzi was handed down from generation to generation.