Can veterans in jiangkou county only have secondary school education to take an examination of public institutions?

This is absolutely possible, because you are a veteran. Didn't the army arrange a job for you? In the past, secondary school education was assigned to public institutions, and there was no need for examinations. Generally, it used to be assigned to institutions after military transfer and to institutions after graduation from technical secondary school. If these two places are not assigned to you, it will be very difficult for you to take the exam yourself, and the chance is very small, because when you are a soldier, you will go to a secondary school and have a serious job after changing jobs. The exam itself is not good, you can graduate from high school, but if you can pass the exam, others will have to take it.