"To provide the best experience for customers in China and to comply with China’s legal and regulatory requirements, AWS has collaborated with China local partners with proper telecom licenses for delivering cloud services. The service operator and provider for AWS China (Beijing) Region based out of Beijing and adjacent areas is Beijing Sinnet Technology Co., Ltd. (Sinnet), and the service operator and provider for AWS (Ningxia) Region based out of Ningxia is Ningxia Western Cloud Data Technology Co., Ltd. (NWCD)."
All of this is to say nothing of the additional restrictions imposed by the government -- I agree with contingencies that it's "not easy" to run a business in (AWS) China, but I think that at this point everybody who's seriously thinking about doing so knows what to expect.
[0] https://www.amazonaws.cn/en/new/2017/now-add-additional-prot...