Introduction to Yecheng: It has a history of more than 1,200 years from the time when Duke Huan of Qi built Yecheng in the Spring and Autumn Period to the time when it was burned down in the Northern Zhou Dynasty. During this period, it was the capital of the six dynasties of Cao Wei, Hou Zhao, Ran Wei, Qian Yan, Eastern Wei, and Northern Qi. It served as the capital of the Yellow River Basin It has been a political, economic, military and cultural center for four centuries and is known as the "hometown of the Three Kingdoms and the ancient capital of the Six Dynasties".