Qin Guoying's surname was Zhao. He founded the country since he was a child. It took more than 700 years to unify China and establish the first centralized dynasty in history.
The reason why this book begins with Duke Zhuang of Qin is because it was from Duke Zhuang of Qin that the land of Qin began to develop into a vassal state. Duke Zhuang of Qin laid the foundation stone, and Duke Xiang of Qin began to formally ennoble the princes, making Qin a formal vassal state - the State of Qin. Later, through the joint efforts of 33 monarchs including Qin Wengong, Qin Wu Gong, Qin Mugong, Qin Huan Gong, Qin Xiaogong, Qin Huiwen, Qin Zhaoxiang, Qin Shihuang, and more than 700 years of bloody battles, falling and getting up many times, it was not until Qin Shihuang that he was able to unify the Central Plains and establish the first centralized state in history to implement the county system. It can be said that the great China began with the Qin State.
Before Qin, countries such as Xia, Shang and Zhou were also one country. But they all adopt the enfeoffment system. A country contains dozens or even hundreds of vassal states. Not uniform.
