1 time every weak means 52 haircuts/year.

in 15-20 years = 1040 haircuts.

female population in china = 644 mio

So what's your problem? If you have a problem with girls who choose to cut their long hair, you can spend money for them, because having long hair is expensive and in china there are very many poor people.

But I'm sure you don't want to spend 1 cent for them beacuse you are selfish.