First, transfer you to another tutor in A, continue to work on the original tutor's project, or directly study the new tutor's project. There is no agreement on this. The other is that you want to go to University B, but your student status is University A. In this case, you can't change your student status. Your graduation defense is a university process, training together and following the tutor. If you recognize the strength and character of the tutor, you can consider taking this road. Change mentors. This premise is that you have other doctoral supervisors in this direction. According to my experience, changing tutors is usually a better choice. After all, you just entered the school now, and the tutor has little influence on you, with no cost and high freedom. But no matter which one you choose, you should take time to discuss with your tutor and don't think about what is possible. It is most important to do your own research, produce results and graduate smoothly.
Second, it depends on whether you are on the mainland or overseas. If you are in the mainland, it is rarely heard that tutors change units, and students can also transfer. You should still be a student of the original school, and you can go to work in the tutor unit. Maybe you must also be appointed as the tutor of your old school. If it is abroad, it is not very common. You can stay in your original school as a student, or you can go to a school where your tutor changes jobs. Mainly depends on which school is good. If you want to follow the teacher, remember to go through the transfer formalities. It shouldn't matter. To tell you straight away, it is impossible to get a B diploma. Because the enrollment of our college is very small, many students from other schools have formally signed a joint training agreement with each teacher as a teaching assistant; Some don't even sign an agreement and work until graduation. I read your question and used the word "landing", so your postgraduate entrance examination process is likely to be discontinuous, that is to say, you are only a novice to this doctoral supervisor. It's only August, and it doesn't officially start until September.
Third, my personal suggestion is to change the guide. Humanities and social sciences are not bad. If it is science and engineering, you need to use a laboratory or something, and you have to work in a new school. Accommodation is basically available. Your tour guide is also a newcomer to the new school, and his behavior will definitely not be like this. It's easy, but it's still inconvenient to deal with the small things of the original school from time to time. Of course, if your tutor's research direction is particularly good, you are also interested in it, and you have expectations for results, or your tutor's contacts are very good, and he can be recommended by similar work units after graduation, you can keep the original tutor's name.
Personal experience tells you that it is impossible, absolutely impossible. Of course, if your tutor is an academician and has strong energy, it is also possible. I graduated from the Institute of Mechanics, Chinese Academy of Sciences with a doctorate. For some reason, my tutor Liu Jiaoshou was transferred to Peking University two and a half years before I graduated. At that time, Teacher Liu told me: You can go to Peking University with him, or you can find a teaching assistant in the detention center. Considering the trouble of going to Beilian, and considering that I am about to graduate, I chose the latter. So I transferred to the Longguan research group of the Institute of Mechanics, from fluid mechanics to biomechanics. Due to the change of research direction, the doctoral research time has been extended by one year.
My two tutors are excellent, and they are both outstanding in their respective research fields. Liu is currently the vice president of Peking University Institute of Technology. The main research direction is computational fluid, which is quite influential in the industry. Excellent students majoring in mechanical and computer science who want to study for a doctorate. You can contact Mr. Liu. Mr. Long Mian is currently the director of Biomechanics and Bioengineering Center, Institute of Mechanics, Chinese Academy of Sciences. The main research direction is cell-molecular biomechanics, and it is also influential in the field of biomechanics. Excellent mechanical and biological students who want to study for a doctorate. You can contact Mr. Long. If you confirm that you followed your tutor in the past, you will get a diploma from B University. You can check the graduate transfer regulations, and universities in different provinces and cities may be different. An example of referring doctors in Beijing. After the students received the letter of admission, the tutor was transferred to a new school. He said that if he wanted to go with him, he could try to transfer him away. Both students expressed their willingness to go. Beijing stipulates that graduate students must study for one semester twice a year before applying for transfer, and not at other times.
Students are studying for master's degree and doctor's degree. At first, they studied basic courses in the enrollment unit. The next year, they transferred to their tutor's new school. Two students graduated with new school diplomas. During this period, the staff of the former unit often mobilized students. Let's choose another tutor. There are also good mentors. It's troublesome. It's not getting better. A few months ago, the students practiced with their tutor. Some people say that it was never right until the transfer. The graduate students recruited by the tutor stayed in the original unit, and the tutor and guidance also graduated smoothly. In this case, the tutor is usually transferred. As for the continuity of work, it depends on how the tutor arranges it.
As for the arrangement of the unit when the article is published, it depends on the specific graduation requirements of your A university, which I have never seen before. So if this is the case, the general practice is to handle the previous methods and transfer them to the tutor. I have a friend whose tutor is a part-time job in a dual college. Before he went, his tutor enrolled students in universities in Beijing and Shanghai. This is the graduation defense completed in Beijing. In line with the procedures of Shanghai University. Now his tutor is going to be the dean of another university in Shanghai, but he still takes the original graduation track.