[1, Qin Xiaogong]
Qin Xiaogong (381-338 BC), surnamed Ying, was the son of Qin Xiangong. He ascended the throne in 361 BC at the age of twenty-one. The rise of the Qin state has been a long time, and its rise to strength began with filial piety. Qin Xiaogong trusted Shang Ying, vigorously promoted the reform of the law, and made the country rich and strong with the rule of law, farming, and conquest, so that the Qin State quickly became the strongest in the Warring States. Qin Xiaogong worked hard, issued an order to seek talents, and appointed Shang Ying to implement the law change. The reform presided over by Qin Xiaogong and Shang Ying was the most comprehensive, systematic and thorough, laying the foundation for Qin's unification of China.
[2, King Qin Huiwen]
King Qin Huiwen, surnamed Ying, named Si. He ascended the throne in 338 BC and was the first monarch of the Qin state to be crowned king, and was the second generation of the Qin state to be the "rule of law" monarch. Although he killed Shang Ying, he inherited Shang Ying's career and devoted himself to the rule of law and farming. Its measures played a decisive role in the improvement of the legal system and the formation of the rule of law tradition in Qin. He decided to use the diplomatic strategy of "connecting horizontal" and "co-vertical" to defeat the coalition forces of various countries on many occasions. King Huiwen of Qin adopted Sima Cuo's strategy, sent troops to conquer Shu and Ba, set up Ba County, and sent troops to attack Hanzhong of Chu and set up Hanzhong County. So far, the Qin State occupies Guanzhong and Bashu, the two "countries of abundance", and gains strategic advantages. King Huiwen of Qin, like his ancestors and descendants, always regarded the establishment of the imperial industry as the strategic goal of the Qin state, and gradually moved towards this goal through practical measures. He died in 310 BC.
[3, King Qin Xiaoxiang]
King Qin Zhaoxiang, surnamed Ying, named Ji. Ascended to the throne in 306 BC. King Zhaoxiang of Qin reigned for 56 years, further consolidating Qin's position as the first power. He was once emperor and destroyed the Western Zhou Dynasty, and was a king who consciously followed the rule of law, further strengthening the centralization of power. In 272 BC, the Qin state completely destroyed the Yiqu state and set up Longxi County, Beidi County, and Shangjun to eliminate the northwest border troubles. During the reign of King Zhaoxiang of Qin, the military and diplomatic strategy of "distant friendship and close attack" gradually became clear. The Qin general Bai Qi frequently went on expeditions to the east, annihilated the enemy army, weakened the enemy, and killed more than 200,000 people of the main force of Zhao in the Battle of Changping. One major military victory after another has severely reduced the strength of several neighboring countries. In 255 BC, the Qin state conquered the Western Zhou Dynasty and captured Jiuding, and the Zhou dynasty fell.
[4, Qin Shi Huang Yingzheng]
Qin Shi Huang (259–210 BC), founder of the Qin Empire, was the first emperor in Chinese history. Mingzheng is the son of King Xiang of Qin Zhuang. He succeeded to the throne in 247 BC at the age of 13. In 238 BC, the prince of Qin was in power, pacified the rebellion of Changyu, dismissed Lü Buwei from his post, and appointed Wei Yi, Li Si and others to formulate strategies and tactics for the unification war. From 230 BC to 221 BC, he successively destroyed the six kingdoms of Han, Zhao, Wei, Chu, Yan, and Qi, and established the Qin Dynasty, the first unified, multi-ethnic, and centralized state in Chinese history, and proclaimed himself the "First Emperor". The county system was implemented throughout the country, the system of three public and nine secretaries was established, the national weights and measures were unified, the national currency system was unified, the Chi Road was built, the spiritual canal was dug, and the writing was unified. In addition, it also attacked the Xiongnu in the north and Baiyue in the south. Qin Shi Huang was an accomplished statesman. In July 210 B.C., Qin Shi Huang went on a tour and died of illness in the sand dunes on the way back to the north, where he was buried in Lishan.
Among the four heroes of the Qin State, the most powerful is Qin Shi Huang. He unified the six countries, achieved the true sense of unity in Chinese history, created a feudal society for more than 2,000 years, unified currency and writing, and also established the system of three princes and nine secretaries, and unified the national weights and measures.