Although your cousin is now a sixth-grade student, her weight is 120 Jin, which shows that she is growing fast and has great strength. You are a college student, maybe your weight is not very heavy. He can pick you up and turn around because he is still young, but he weighs 120 Jin and has great strength, so he can hold you. Maybe she is usually like this. A person's strength is related to his usual exercise. I usually pay attention to exercise, of course, it is no problem to pick you up. I wish you a happy life.