It is the biggest problem in China.
Now I will tell you about the China's population proportion.
In China,you can see people everywhere.
20.27% of the population is under 15.
68.70% of the population is between 15-59.
10.57% of the population is over 60.
Among them,7.69% of the population is over 65.
It is a terrible data.
I hope I can do something for my country.
So I came to Japan.