According to the "salt and iron theory leading to a secluded place", Zhicheng at that time was rich in rivers and rivers, and it was one of the world's famous cities. In 29 1 year BC, the state of Qin captured Xidi, and after reunification, Chixian County was established, belonging to Sanchuan County. At the beginning of the Western Han Dynasty, Hanoi County was changed and salt and iron officials were set up. In the first year of Lv Hou, Liu Chao, the son of Emperor Hui Di, was appointed as Hou. In the first year of Emperor Wendi, he was named Hou. The northern dynasties also sealed the country, so it was called the "ancient country", and the stone amount still exists. In 627, Jixian County was merged into Jiyuan County. Abandoned from 633 BC to 627 AD, the old city experienced the vicissitudes of 1260 years.
The total area of Iron Pot Old Town is about 325,000 square meters. The plane is square, slightly wider from east to west, and only the south wall is slightly folded outward. The east and south city walls are well preserved on the ground, and two ruins of the city gate are found. There is still 70 meters on the ground in the corner building section of Xicheng, and it is found that there is a door and a water, and only a section remains in the eastern part of the north city wall, with a height of 1 meter. Dongcheng wall is 1766m long, 6-30m wide and 1-8m high. The wall of Chengnan City is1865m long, 8-32m wide and 2-9m high. The city wall is rammed, with the rammed layer thickness of 8- 1 1 cm, which is round.
Molded rammed nest, 6 cm in diameter and 0.5 cm in depth. Flat rammers were found in the south city wall, including rammed soil layers in the Spring and Autumn Period, Warring States Period and Western Han Dynasty from bottom to top, and the potential in the city gradually decreased from south to north. Nigou River (ancient earth ditch water) enters the city from the southwest gate and passes through the city from the north gate. Getapo (formerly known as Golden Funeral Home) in the northwest corner of the city is a palace area. There is an ancient ancestral temple in the city center, which was daming temple in the Northern Song Dynasty. Fifty meters in front of the temple, more than ten pottery kilns were found on the west bank of Nigou River, which should be the ruins of pottery workshops. There is a square high platform with a side length of 100 meters in the East Gate, which is the architectural site of the high platform in the old city. Over the years, a large number of pottery, stone tools, bone wares, iron wares and bronzes have been unearthed in the city wall, among which the 5,000 Fan Shi, stone millstones and bronze fuming stoves of Emperor Wen of the Han Dynasty are very precious and full of characteristics of the times. After investigation, the layout of the inner square of the city wall is relatively regular.
There are many ancient ruins in the suburbs of the old city. In Sijian Village, 2 kilometers south of the city, there is a famous ancestral temple in Nie Zheng, one of the Warring States The Four Assassins. Four ancient tombs are the burial areas of aristocratic officials in ancient countries; Tunjun village in the north of the city is a garrison guarding the ancient kingdom; Liuyang village in the west of the city is the storage place of supply trenches in the old city. In the third year of Jianwu in the Eastern Han Dynasty, haing s ngor led an army to attack Du Qing's army in western Shandong, and Zhongwang Village (formerly known as Zhong) in the east of the city was the garrison of Zhong You, the general of Wei in the Three Kingdoms period. There are still four tombs in the northeast of the village, which are said to be the tombs of Zhong You and his son.
The ancient city of Tiguo has important physical value for studying its political, military, economic, cultural and productivity levels at that time.