Most core journals have no publishing fees, but the core requirements are very high. 1, the quality of the article is high, and the author's own education and the author's unit have requirements (undergraduates can basically ignore it/send it with the tutor); 2. The operation time is relatively long, and it is generally best to prepare in advance about 1 year (the review takes about 3 months, and the later review may need to be revised); 3. If you vote by yourself, you have to pay the page fee yourself, ranging from thousands to tens of thousands. If it is on behalf of the company, there are many examples in which the operating core has been cheated by tens of thousands. If there are resources in this area, you can choose to send it, otherwise it is not recommended to send it.