I am 52 year old lady , can I adpot one Chinese girl aged 6-8 year old ? how much fee I pay?

There are four basic rules that should be followed:
1. Both parties of the couple are above 35 years old. They should have steady income and healthy.
2. If the kid is more than 10 years old, it requires his or her approval.
3. The couple or group legally taking care of the kid.
4. The adoption obeys to the law and corresponding rules of the adoptor's country.

Therefore, you can weigh whether you can be successful in adopting a kid in China. Whether you need to pay or how much you will pay depends on the couples or groups taking care of the kid.