We are excited to announce the availability of Amazon EBS encryption in AWS China (Beijing) Region operated by SINNET, and AWS China (Ningxia) Region operated by NWCD.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/amazon-ebs-encryption-now-available-in-aws-china-bejing-region-and-china-ningxia-region/