Solution

…It is located on the north side of the Chujo Mountain Range, along the Tongpu Railway (Datong-Mengyuan). In 1958, Anyi and Jieyu counties were merged to form Yuncheng County, which was incorporated as a city in 1983. Anyi was re-established as Nananyi County during the Sui Dynasty, and the county seat was located in Anyicheng, northeast of Yuncheng. It was also the seat of Yuzhou and Anyi County. …

*Some of the terminology explanations that mention "kaiko" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…中条山脈北側にあり，同蒲鉄道(大同～孟塬)に沿う。1958年安邑，解虞両県を合併して運城県が設置され，83年市制施行。安邑は隋代に南安邑県を改めて設け，県治は運城北東の安邑城にあり，虞州，安邑郡の治所となったこともある。…

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出典｜株式会社平凡社世界大百科事典 第２版について | 情報