The most outstanding monarchs of Qin are: Qin Shihuang, Qin Xiaogong, Qin Mugong, Qin Xianggong, and Qin Feizi.

There is a historical evaluation in Sima Zhen's "Historical Records Suoyin" which says: Feizi stopped his horse and was nicknamed Qin Ying. Ritual music shoots at the emperor, and there is sound hanging from the west. Qin Feizi is a descendant of the ancient tribal leader Zhuanxu, the fifth generation grandson of Erai, an important minister of the Shang Dynasty, and the founding monarch of the Qin State, a vassal state of the Zhou Dynasty. Because Feizi was good at raising horses, he was appreciated by King Xiao of Zhou and was granted the title of Qin. He became the first king of Qin and was known as Qin Ying.

Qin Xianggong, the second son of Qin Zhuanggong, was the first monarch of Qin who was officially listed as a vassal during the Spring and Autumn Period. In 778 BC, Qin Zhuanggong died and Qin Xianggong came to the throne. At that time, Qin was weak and Di Rong was a nearby threat. When Qin Xianggong first came to the throne, he married his sister Miao Ying to King Feng of the Rong people to divide the Rong people. In 776 BC, Qin Xianggong moved his capital to Qiyi and advanced eastwards. In 771 BC, the Marquis of Shen and Quanrong attacked Haojing and killed King You of Zhou at the foot of Mount Li. Qin Xianggong rescued Zhou with his troops.

Achievements of Qin Mugong

Qin Mugong was a king of Qin during the Spring and Autumn Period. When Qin Mugong just succeeded to the throne, he personally led his troops to conquer the Rong people in Maojin and won the victory. After that, they tried their best to build relations with the Jin State, the overlord of the Central Plains at that time, and exchanged in-laws, so that was the reason why the Qin and Jin Dynasties came to be.

In terms of military affairs, Qin Mugong was still a man who was good at running the army. The people of Qin have a tradition of raising horses since ancient times, and they can be said to be a nation on horseback. After Qin Mugong came to power, he took advantage of this and established a cavalry unit and equipped each soldier with a dagger. This was much earlier than the reform of King Zhao Wuling's Hufu riding and shooting. This is why the idiom "hand in hand" comes from this.

During the reign of King Xiang of Zhou Dynasty, Duke Mu of Qin sent troops to attack the country west of Hangu Pass and opened up more than a thousand miles of territory. Therefore, King Xiang of Zhou appointed him as the uncle of the western princes, and then he dominated Xirong and laid the foundation for Qin to unify China in the future. The cornerstone was laid.