Both provinces are 2 1 1, and the level is actually not much different. I suggest you think about your favorite major first, and then choose a school according to your major.

Zhengzhou University has a complete range of disciplines, especially medical majors. Yunnan University and Northwest University have no medical majors. The dominant majors of Zhengzhou University are physics, chemistry, preventive medicine, engineering mechanics, hydraulic engineering, chemical engineering and technology, material science engineering, communication engineering, journalism, law, history, administration, tourism management and finance.

The dominant majors of Northwest University are geology, chemistry, economics, resource exploration engineering, history, physics, traditional Chinese medicine, Chinese language and literature, archaeology, resource environment and urban and rural planning and management, optical information science and technology, process equipment and control, and administrative management.

The dominant majors of Yunnan University are environmental science, chemistry, public administration, computer science and technology, Chinese language and literature, international economy and trade, political science and administration, atmospheric science, ecology, journalism, network engineering and tourism management.

If all three schools are your favorite majors, let's see which city you prefer.