Extended data
1, Donghai County: also known as Tanjun and Haizhou. There are three places in the history of Donghai County: ① Located in Tan Yi (now Tancheng, Shandong Province), and later Tanxian County, which belongs to Xuzhou Secretariat Department and governs counties, counties and secretariat departments. At the end of the clan society, people had settled in the territory, and the situation was "Dongyi". Taishigong was a famous chieftain in Dongyi, with a small number.
During the Spring and Autumn Period, Tan was attached to Lu, which is why "Tan Zi lived in Lu" and "Tan Zi was taught by Confucius" were destroyed by Yue during the Warring States Period. In the Qin Dynasty, Tan County was first established and later renamed Donghai County. ; It was once called Tancheng County in Qin and Han Dynasties, and later belonged to Cheng Zheng area, located in the north of Tancheng County. The Western Han Dynasty governed 37 counties,
At that time, it was under the jurisdiction of Feixian County, Linyi, Shandong Province, south of Ganyu, Jiangsu Province, east of Zaozhuang, Shandong Province, and north of Suqian and Guannan.
② During the Eastern Jin Dynasty, it was located in Donghai County, Yu Hai County (now Changshu, Jiangsu Province) and later moved to Jingkou (now Zhenjiang, Jiangsu Province). At that time, it had jurisdiction over Feixian, Linyi, southern Ganyu, Zaozhuang, eastern Pixian, Suqian and northern guannan county. In the sixth year of Zhenguan in Tang Dynasty (Renchen, AD 632), he withdrew from the county and entered Xiapi.
Tang Yuanhe was restored in the middle period, initially named as "Tancheng" county, and soon merged into Linyi; Tancheng County was restored at the end of Yuan Dynasty. After the Ming and Qing Dynasties, the county territory has changed, but the county name has not changed. After the establishment of People's Republic of China (PRC), its land belongs to Linyi. (3) During the Eastern Wei Dynasty and the late Sui and Tang Dynasties in the Northern and Southern Dynasties, Haizhou was Donghai County and Yishan (now Haizhou Town, Lianyungang, Jiangsu). At that time, it was located in the area east of Donghai County, Jiangsu Province and north of Huaishui.
2. Dongguan County, which belonged to Chengyang County in Han Dynasty, was renamed Dongguan in Jin Dynasty, and was ruled by Juxian County in Shandong Province.
3. Tianshui County, which belonged to Pingxiang in the Western Han Dynasty (the old city is now northwest of Tongwei, Gansu Province), changed to Hanyang County in the Eastern Han Dynasty and moved to Jixian County (the old city is now southeast of Gangu, Gansu Province). The Three Kingdoms of Wei was another water county, which was moved to Tianshui, Gansu Province in the Western Jin Dynasty.
4. Yingchuan County, Jinji County, located in Yangzhai (now Yuzhou, Henan Province).