AWS has a press release detailing the arrival of AWS to China.
One nugget in the AWS blog is the business is a bit different in China than other sites.
Our business model will be slightly different here than in the other AWS Regions. You will need to create an AWS account that is specific to the Region. We will be posting additional information on AWS China website as it becomes available.
Here is the news China AWS site. Below is the site with Google Translate to english.