Useful. During the master's degree, doctoral students must publish one or two papers in core journals or related academic journals before they are eligible to apply for or audit the system. Now the tutor agrees to the sci paper. If there is no SCI paper, the tutor is unwilling to bring it. With SCI papers, it is easy to apply for the exam. If the score of CET-6 is above 450, it will be easy to take the exam. Being able to publish an English sci of the first author has been very powerful during the master's period, and many of them graduated from Chinese. As for taking the doctoral examination, I think it is very useful if you are the first author, which means that you can complete an experiment independently, which is very helpful for you to take the doctoral examination.