The harmonious Qi of heaven and earth converges into the Gu acupoint and enlightens wisdom within, giving birth to a human being, which is called Citron. Later generations called him Citron (Yuan) Emperor, the ancestor of human beings.
——"Tian Xuan Jing\Gu Citron"
According to legend, in ancient times, on the Qingtong Continent, ethnic groups were divided, princes were separatist, and wars raged for years. The people lived in the heat of water. After the Emperor of the Yuan Dynasty was established, he unified Qingcitron, and the country was named Gu. It was known in history as the "Prosperity of the Qianyuan Dynasty". At the right time, with light corvee and little wealth, the people will live and work in peace and contentment, and their hair will be well-nourished.
Four hundred years later, divisions resumed, and the five kingdoms of Ji, Citron, Wei, Chen, and Chao were separated.