禹州市情简介 [Yuzhou Introduction] (in Chinese). Yuzhou Municipal People's Government. 2021-03-05. Archived from the original on 2021-11-23. Retrieved 2022-01-04.
禹州市情简介 [Yuzhou Introduction] (in Chinese). Yuzhou Municipal People's Government. 2021-03-05. Archived from the original on 2021-11-23. Retrieved 2022-01-04.