Why does "Why the Bell" rely on silence to keep long hair?

Because when Mosheng and Yi Chen fell in love, that is, when they were in college, Mosheng had long hair, and later Mosheng came back from the United States with short hair. When they were together, Yi Chen missed the old Mosheng very much, so she was asked to have long hair ~ ~ "This way you will have more" means that she is more like the old Mosheng ~ ~