In the Three Kingdoms period, which direction was Shanyang County in Yanzhou?

Yanzhou contains a number of small countries and counties, which are very large. It has eight counties under its jurisdiction, namely, Chenliu, Dongjun, Rencheng, Taishan, Jibei, Shanyang (today's Yanzhou belongs to Shanyang County), Jiyang and Dongping, covering the western part of Shandong and the eastern part of Henan. Yanzhou includes Shanyang county, which is in the south-central part of Yanzhou, so it only takes the governance as the direction coordinate.

Shanyang county: or Shanyang country or Changyi country. It is an ancient county in China, whose name was Changyi county, and it was excluded from the county in Wei Dynasty. According to the examination of the Three Kingdoms, Changyi County was ruled in the south of Juye County, Shandong Province.

Yanzhou: During the Three Kingdoms Period, Yanzhou belonged to Wei. After Cao Cao led the animal husbandry in Jizhou, in order to expand the sphere of influence and narrow down other regions, he merged into Jizhou, and Yanzhou remained in charge of eight counties and countries. Only Chen Liu in the Han Dynasty was changed to Chen Liuguo, and Ren Chengguo was changed to Ren Chengjun. According to "The Territorial Records of the Three Kingdoms", Yanzhou first ruled Changyi, and later moved to rule Xuqiu (now east of Juancheng County, Shandong Province).

referring to the current map of Shandong, it can be seen that at first Yanzhou and Shanyang Institute were located in Changyi, and later Yanzhou Institute moved to Juancheng, which is not far from the northwest of Juye. They are all in Heze city today.