The Ministry of Education mainly examines whether there are flaws in college admission and whether the information of students to be admitted is complete and true. The pre-admission list is approved by the Ministry of Education before it becomes a formal admission list. However, you don't have to worry too much. The examination and approval by the Ministry of Education is generally only a process and will not affect the admission results. Unless it involves the falsification of candidates' academic qualifications and major problems in the process of college admission, the pre-admission list of the school will be revised. Zhengzhou University has to be approved by the Ministry of Education before it can issue an admission notice. Basically, mid-June will be fine. Please be patient.
If you need to know anything, you can continue to ask, hoping to help you.