Zhengding Ancient City Wall as the defense system of ancient cities, divided into two parts: city wall and moat. The city wall was built in the period of 352 years in the 16th Kingdom of Eastern Jin Dynasty, and has a history of more than 1600 years. It has been through the changes of the times and the history of the vicissitudes. It is still standing tall and majestic. for key cultural relics protection units throughout the country.