The yellow emperor yan emperor tribal alliance into the Chinese nation, the 21st century BC to the 16th century BC, is China's first dynasty - xia dynasty period. It marked the end of China's primitive society for several thousand years and the beginning of class society for thousands of years. His birth became an important milestone in the history of Chinese civilization. The eastern yi people appeared in the xia dynasty, which lasted for fourteen generations and seventeen Kings for nearly five hundred years.
Xia yu was credited with controlling the flood, and he became the founder of the xia dynasty. After the throne, yu had his capital in yangzhai and his capital in anyi or pingyang. He repeatedly assembled the vassals, divided China into nine states, and established the system of tribute. 
Yu not only cured the flood, but also conquered li and miao. After the death of da yu, his son xia qi destroyed the tradition of abdication and established himself as king, restoring the ancient system handed down by father and son in the early days of the yellow emperor. From then on, the king did not pass on his son, qi implemented the hereditary system, began what the ancients called "family". Pass to taikang, qi the fifth son defected.
Xia qi ascended the throne, very able to inherit the cause of dayu, but after his death, his son taikang incompetent, by a vassal leader, the legend of chang 'e's husband houyi by. After taikang's death, yi set zhongkang, taikang's younger brother, as the summer king, but the real power was manipulated in the hands of houyi. After zhong kang's death, his son zhuo li, hou yi was killed by his subordinate han zhuo, and he allowed himself to be free. When phase is killed phase of the queen rouleau is pregnant, fled to still, less health. As shao kang grew up, he collected the remnants of xia, destroyed han zhuo and restored the xia dynasty. The history says "little kang zhongxing". Zhu zhu, the son of shao kang, had a powerful armed people, sweeping away the powers of han zhuo, and sweeping away the eastern barbarians, bringing the xia dynasty to its full prosperity. After the five dynasties and six Kings, the society was relatively stable and the economy continued to develop. Xia dynasty ruled, east to the east China sea, west west river, north and yanshan, south over jianghuai. At that time, bronze could be smelted better, and many bronze tools and utensils for daily use were produced. There is a more progressive yin-yang calendar and the dry branch of the method of recording the day. In the 15th dynasty, kong jia, king of the xia dynasty, was good at magic, evil spirits and fornication, which caused the rebellion of the princes, and the xia dynasty gradually declined. Kong jia was passed on to lugui (xia jie) again and again. He was a famous tyrant in history. He did not practice morality and was extravagant.