Pingyao is known as Pingyao Sanbao, one of which is the ancient city wall. It is one of the four most perfect ancient city walls in our country. It looks like a tortoise, so Pingyao is also called the turtle city. Founded in the Xuanwang period of the Western Zhou Dynasty, the Ming Dynasty began to take shape with a total length of about six kilometers. The wall foundation was a stone, and the wall was compacted with earth. There are corner towers in the four corners of the city wall, Confucian Temple in the Southeast corner, Queen Star Tower and Wenchang Pavilion in the south, but Wenchang Pavilion can not be seen now. Because of the severe weathering, there are many collapses in many places, and many enclosed walls can be seen.