The paper has been hired by the journal, so you can pay the page fee directly first, and then use the invoice to go to the boss for reimbursement. Generally, the school will give each student a scientific research fund, which is directly in the hands of the tutor. After accepting the article, talk to the boss first, let him know about it, and then give it to your boss after getting the invoice, and he will reimburse you. If the boss's research funds are insufficient, he will generally reimburse some of them. However, we should pay attention to the quality of the delivered periodicals. Some tutors are unwilling to admit low-quality journals or even be named. In this case, they will definitely not help you pay the page fee.