Heze.

Heze is the westernmost prefecture-level city in Shandong, standing on the south bank of the Yellow River where the province meets Henan and Anhui. Its name comes from a natural marsh that once lay here, fed by the Ji River; the water has long gone and the land is flat alluvial plain. In 1735, the thirteenth year of the Yongzheng reign, Caozhou was raised to a prefecture and a county was set beside it, named Heze after Mount He to the south and Lake Lei to the north. The city covers 12,238.62 square kilometres and counted 8,795,939 residents at the 2020 census. It calls itself the Peony Capital of China, and it holds Yuncheng, the county that the Water Margin stories claim as the home of their heroes.