Lanling County: Lanling County was founded in the first year of Jin Yuan Kang (29 1) and was separated from the former Donghai County. Located in Cheng County (now Yicheng Town, Zaozhuang, Shandong Province), it leads to five counties. At that time, it included Zaozhuang and tengxian. In the third year of Sui Dynasty (583), Huang Kai was deposed. Lanling County is also called Jining, Bianxian and Zaozhuang.