Regarding the ratio of male to female, I think that for most engineering majors, the number of boys is several times more than that of girls.
I am a freshman majoring in computer science at China Southern Airlines. At that time, there were about 30 students in a class, including about 6 girls. In my sophomore year, I changed my major to electrical engineering and automation. There are about 35 students in a class, and girls account for about 10. In proportion, I think there are more female students majoring in electrical engineering. According to the survey, the ratio of male to female is 2: 1.
I don't think this ratio is an imbalance between men and women. It is normal for engineering boys to be more, not just electrical majors.
In addition, the fact that there are more boys than girls does not mean that girls majoring in electrical engineering are not suitable for learning electrical engineering. The girls around me are very good at learning, whether from homework or doing experiments in class. It is not that many majors that boys apply for are not suitable for girls, but that they should look at their own interests.
In life, judging from my four-year life experience in China Southern Airlines, the relationship between men and women is very harmonious. Making friends is very active, and there are platforms for making friends such as confession wall. If it weren't for some special majors such as missile specialty and weapon specialty (no black meaning), the ratio of male to female would be very harmonious.
I don't know the threshold of the serious imbalance between men and women mentioned in the title. The male to female ratio of Nanjing University of Aeronautics and Astronautics is 3: 1. Although there will be more boys, I think people around me usually live in harmony. Even if there are several girls or boys, there will always be more majors or other schools nearby to balance them.
I hope my answer can help you!