Some teachers have places but can't recruit students, and some teachers have fewer places but more students apply. In this case, other teachers will borrow places. There is also the requirements of the school, which is related to the requirements of the school. Some schools require associate professors to take two students and professors to take three.
In fact, it is also good for the tutor to take only one of you. You can teach everything by yourself and help revise the paper. The quality of articles may be relatively high, which is conducive to establishing academic confidence and publishing high-quality articles. Another teacher of my research group, whose students all have master's thesis, and although I have a master's tutor, brothers and sisters and a large family, the teacher is also busy with the project, so we only have one thesis.
As a mentor, if you are still yourself, hard work and joy coexist. Resources and labor are yours. And different majors, different tutors, and different styles. Some tutors will be more relaxed, and some strict tutors may need to be in the laboratory every day.
The bad thing is that the teacher will only look for you two. You should do your own work and exercise your mentality. The great tutor has ten apprentices, so everyone has less work to do, and the little tutor can only give you one. Without your younger brothers and sisters, there will be no one to help you with your own experimental project, but you may come to your younger brothers next year. If you are a young teacher and happen to be a struggling person, this is a good thing.