The nation of China is more than 4000 years old, and recent discoveries are shedding new light on its origins. Joint research by Chinese and Japanese archeologists is uncovering evidence of a new dynasty which existed before the Shang. It was the Xia, the first dynasty established by Yu the Great, who is said to have saved many people's lives from violent floods through his diligent flood prevention works. In the past decades there have been archaeological digs across the country, yielding many astounding findings. Archeologist explore how the first chaos was followed by a dramatic development of the first dynasty and what would create the base of a great civilization. Part of the series China 2000 B.C.