Today we are announcing a price reduction of 30% on P3 1-year Reserved Instances and 10% on the 3-year Reserved Instances in the AWS China (Ningxia) Region, operated by NWCD. In the AWS China (Beijing) Region, operated by Sinnet, we are reducing P3 1-year Reserved Instances by 40% and 3-year Reserved Instances by 10%. 

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/06/reduced-pricing-aws-p3-reserved-instances-available-aws-china-beijing-sinnet-aws-china-ningxia-nwcd/