Personally, I think the advantage of doing this is that it can improve the quality of graduate students; The disadvantage is that it increases the study time and is unfriendly to some elderly people.

Let's talk about benefits first. The advantage is that it can improve the quality of graduate students. In the previous two-year academic system, it can be said that many graduate students study for graduation, because graduate students usually need to publish papers in industry journals, and these papers need at least three months from project initiation to experiment and finally to publication, which is still the speed of writing papers. For most people, it is good to write it in six months and publish it successfully. Many graduate students began to consider papers when they were admitted to graduate schools. During the whole academic system, they spent two years struggling with their papers while studying, which greatly increased the learning pressure of graduate students. Extending this to three years can make these graduate students less stressed, so they don't have to prepare their graduation thesis from the moment they are admitted to graduate schools.

Let's talk about shortcomings first. This is only for those who are anxious about their age, because it will take another year to finish graduate school after three years. For some people who go to college at night or have served in the army for two years during their college years, the problem is very big. Because according to my age 18, I went to college, served for two years, and was 20 years old. I went to college for four years, and then I went to graduate school for three years. I'm 27 years old, almost 30 years old. The retired students around me have such anxiety, and it is not easy to take the postgraduate entrance examination. You may not be admitted to your favorite university once, but you have to take it for another year. Of course, this kind of people is only a minority, because most of them study normally, and they don't say anything about service. Even those who serve don't care much when they come back to study for a master's degree, because many undergraduates serve themselves to get extra points for postgraduate entrance examination.

Generally speaking, the advantage of extending the graduate school system is that it can improve the graduation quality of graduate students, and the disadvantage is that it will increase some people's anxiety about age.