Answer:
Mainland China or the People's Republic of China does not have any Girl Guides or Girl Scouts.
However, in 1997, Hong Kong became a Special Administrative Region of the People's Republic of China and the Hong Kong Girl Guides Association acts as a bridge between the World Association of Girl Guides and Girl Scouts (WAGGGS) member organizations and mainland China.
In Hong Kong, the Girl Guide levels are:
Ranger Guide ages 15-21
Guide ages 10-18
Brownie Guide ages 6-12