Symbol of the Chinese Nation
The Great Wall represents the unification of China. It came into being when the First Emperor of Qin had the walls of Yan, Zhao, and Qin joined up after the Warring States Period. The Great Wall is a testimony to the history and strength of China.
The wall aimed to strengthen the defense of the local regime. The State of Qi and others in the north took similar defensive action. After Qinshihuang united the country and established the Qin Dynasty in 221 BC, the defensive walls built by former northern vassal states were linked.