Generally, papers are published by themselves or through intermediaries. It is not illegal to find a formal intermediary, but there are many gray areas in this industry, and it is easy to be cheated by people with ulterior motives if they are not careful. Therefore, we must pay attention when choosing. When I published a national periodical before, it was posted on Tao Tao Paper Network. After all, my phone bill is a waste of energy and heat, and I am too busy at ordinary times. This is quite formal, you can also have a look.