Jia Yi's "Treatise on Passing Qin" has a saying: "To the First Emperor, Yu Lie of the Sixth Emperor of Fen, Zhen Chang Ce and Yu Yunei..." This sixth dynasty refers to the six monarchs of the Qin Kingdom from Qin Xiaogong to Qin Zhuang Xiang Wang. After this sixth generation, the foundation for the unification of the Qin state was laid.
Qin Xiaogong reigned from 361 BC to 338 BC
After Qin Xiaogong succeeded to the throne, he deeply felt the gap between the Qin state and several shandong states, vowed to revitalize the Qin state, and appointed Shang Martin to carry out the most thorough reform in the country: reforming the household registration system, abolishing the Shiqing Shilu system, rewarding military merit, emphasizing agriculture and suppressing commerce. In order to enrich the country and strengthen the army. Then he attacked the State of Wei to the east and captured the land of Hexi.
King Huiwen of Qin reigned from 337 BC to 311 BC
After King Huiwen of Qin succeeded to the throne, he ordered the execution of Shang Martingale, but the Shang Martingale Transformation Law was already deeply rooted in the hearts of the people, so the transformation law could continue to be implemented. King Huiwen of Qin was the first monarch of the Qin state to claim the title of king.
King Huiwen of Qin's greatest achievement was to expand his territory, attack the State of Yiqu in the north, go out of Hangu in the east, and seize the State of Chu and Shangyu. The most important thing was to destroy Bashu at the suggestion of Sima Que, providing the most stable granary for the Qin state to unify the world, of course, Bashu rebelled several times, and it was not pacified until the time of King Zhaoxiang of Qin.
During this period, Zhang Yi and the continuous horizontal strategy advocated by Zhang Yi undermined the alliance of the six kingdoms of Shandong and won the greatest interests for the Qin state.
King Wu of Qin reigned from 310 BC to 307 BC
Han Wu, the king of QinWu, was ambitious, expelled Zhang Yi, became close to Ganmao, quelled the Rebellion of Bashu, and seized Yiyang in Korea, which facilitated the eastward march, and also set up a chancellor in the country and attached importance to agricultural development. However, King Wu of Qin died at the age of twenty-three.
King Zhaoxiang of Qin reigned from 306 BC to 251 BC
King Zhaoxiang of Qin was the son of King Huiwen of Qin, originally a proton in the State of Zhao, king Wu of Qin died without heirs, the brothers of King Wu of Guqin competed for the throne, and the intervention of King Wuling of Zhao made King Zhaoxiang of Qin eventually succeed to the throne, and at that time, King Zhaoxiang of Qin was young, and the government was controlled by his mother Empress Xuan and his uncle Wei Ran.
Wei Ran was the prime minister, Bai Qi was the general, and he took the land of Wei Chu, and Empress Xuan even sacrificed hue to booby trap and kill Yiqu Jun, destroying the State of Yiqu. Later, Fan Ju came to Qin and said that with the diplomacy of "long-distance friendship and close attack", he set the strategy of the Qin state to advance eastward, and later King Zhaoxiang of Qin deposed Empress Xuan and expelled the "four nobles", and the king's power was in his hands. After the attack on Korea, the State of Wei, and the Battle of Changping, the State of Zhao suffered heavy losses, and although the State of Qin won a narrow victory, it weakened the strength of the Three Jins in the end, and the eastward advance of the State of Qin was unstoppable.
King Xiaowen of Qin and King Xiang of Qin reigned from 250 BC to 247 BC
King Xiaowen of Qin served as the King of Qin for three days, King Xiang of Qin zhuang as the King of Qin for three years, and during the reign of King Xiang of Qinzhuang, Lü Buwei took the lead and attacked the Eastern Zhou Kingdom. After the death of King Zhuang Xiang, King Zheng of Qin succeeded to the throne, with Xiang Lisi and the generals Meng Tian and Wang Qi. Conquer the Six Kingdoms and unify the world.