This is likely the first AWS operated DC in China. The ones in mainland china are operated by: "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)" [1]

GCP & Azure already have Hong Kong regions. [2] [3]

[1] https://www.amazonaws.cn/en/about-aws/china/

[2] https://azure.microsoft.com/en-us/global-infrastructure/loca...

[3] https://cloud.google.com/about/locations/hongkong/