- Location: Yixian County of Baoding City, Hebei Province

Located in Yixian County, Hebei Province, Yan State sub-capital (燕下都遺址) was built in 311 BC. It was the largest capital during the Warring States Period, and was eight kilometers east to west and four kilometers north to south. A wall divided the city into two parts: eastern city and western city.

The eastern city comprised of a palace, residential area, handicraft industries, cemeteries and a river. Large amounts of cultural relics can be found here. The western city was a sub-city, and was used for defense. Over 100 thousand relics were unearthed since the beginning of the People's Republic of China, boasting great historical and artistic value.

Travel tips:

- Hours: all day long

- Admission: free

- How to get there: taxi