The so-called public refers to some colleges affiliated to some famous universities, and the types of diplomas issued by such colleges are basically the same as those issued by private universities. Private refers to some teaching institutions founded by individuals.
Different teaching levels
The pass rate of self-taught examination in state-owned universities will be much higher. After all, universities have many high-quality teaching resources, and the names printed on graduation certificates are more recognized by the society.
Private self-study education institutions
Private self-taught educational institutions are not good, but only a handful, like some small educational institutions, not to mention fame, it is difficult to say whether half of the students are legal.
Advantages of self-study examination in state-owned universities
When an enterprise signs a contract, it must sign a contract with a state-owned university for self-examination. State-owned universities have high quality students and good teaching quality. Most of these enterprises are relatively good units. I suggest that you apply to some institutions, and the affiliated institutions of famous schools are better.