Master Zhang Yi learned the skill of vertical and horizontal cooperation from Guiguzi. In his early years, Zhang Yi learned the art of vertical and horizontal cooperation under Guiguzi. Later, after coming out of the mountains, he started a company. Yokogawa? Diplomatic strategy, and by saying that the six countries entered Qin. Zhang Yi won the appreciation of Qin Xiaogong's son, King Qin Huiwen, and was named Guo Xiang. He was ordered to go to various countries, and he lobbied back and forth between countries. First of all, he lobbied for the two great powers of Qi and Chu, believing that these two countries wanted Lian Heng, so he suggested to King Qin Huiwen to break up the Qi and Chu Alliance first.
Zhang Yi pretended to resign as prime minister and went to lobby Chu first. Zhang Yi resigned as the Minister of State and cautiously went to Chu as a lobbyist. After entering the State of Chu, he became a guest of Chu Huaiwang. Chu Huaiwang received Zhang Yi with special enthusiasm and asked about the purpose of his visit. Zhang Yi said that Qin had made friends with Chu and hoped that Chu could break diplomatic relations with Qi temporarily. He expressed his sincerity and specially brought Chu 600 Li of land. Chu Huaiwang was very much in favor of Zhang Yi's idea. He also took a fancy to this 600-mile land, so he gave Zhang Yi a photo of Chu and announced that he had broken diplomatic relations with Qi.
Zhang Yiran ran around, and the six countries saw the success of persuading Chu. Later, I made a detour and went to South Korea, Qi State, Zhao State and Yan State respectively. I wiped out these countries through alliances and turned to make friends with Qin State. Just when he returned to the state of Qin with great ambition, King Hui of Qin died while painting, and all the people who supported Zhang Yi fell down, so Zhang Yi became the laughing stock of the DPRK. After the new emperor ascended the throne, he refused to use Zhang Yi again. Fearing that she would end up like Shang Yang, Zhang Yi went to Wei as prime minister.
So Zhang Yi is a very powerful diplomat. He helped the king of Qin to unify the six countries in exchange for Qin's unification of the whole country. Fortunately, he is also very resourceful, and he escaped in his later years and enjoyed his later years.