Many significant things. About 4000 years old, Huangdi became the first leader that we know in Chinese history. He is said to the ancestor of Chinese people and later on, there were many outstanding leaders (Yao, Shun, Yu) in charge of the tribes in Yellow River drainage area. Yu's sun break up the demise rule, establed the first slavery kingdom in Chinese history. Qin established the first feudal dynasty in 221BC. China's terrotory was expanded to an huge empire like never before in the Yuan Dynasty... ...