can I witdraw up to 10,000 dollars in any bank in china from my nigerian bank account?

Emmaanuel, you can use your Ngerian bank to withdraw money from Chinese banks. But I think you should make an appointment with the bank in advance because banks require that people should make an appointment in advance if they withdraw a large amount of money.

You don't need to exchange your money into dollar. But you should know that you just get RMB instead of USD at the bank.