KMS is a region-based service. KMS resources, and limits of resource use, are relatively independent for each user in different regions. KMS is supported in 11 regions: Singapore, China East 1, China East 2, China North 2, China South 1, Asia Pacific NE 1, Europe Central 1, Middle East 1, Asia Pacific SE 2, Hong Kong, and Zhangjiakou.
Each user can create up to 200 CMKs in each region.
Any user needing to create more than 200 CMKs can submit a ticket to Alibaba Cloud.