In order to claim the responsibility of a relative child in China, you would have to prove that you are the child’s relative.
Obtain the updated necessary information from the website of US Department of State as the China Centre for Adoption Affairs (CCAA) changes the information frequently.
The CCAA determines whether you are eligible for adopting the baby or not. You cannot adopt the baby just because you are a close relative, you would have to show your financial strength to prove that you have the necessary amount to give the child a bright future.
You should find a suitable agency that could help you in the process. There are plenty of agencies that specialise in such services. The agency will tell you about the required documents, make sure you attach all of them.
Attach all the documents to your form and hand them over to your agency, so they could forward it to CCAA.
You should confirm the receiving of your request from CCAA and wait till they process your application.
In general, it takes about two months until your application gets approved and the child comes into your custody.