_ChinaRegions

The AWS China (Beijing) Region is an API compatible, but otherwise isolated AWS Region designed to allow China-based and multinational companies to make use of a broad collection of AWS services while remaining in compliance with China's legal and regulatory requirements.

Support for regions in the AWS China partition is an opt-in Labs Feature:

The AWS China partition provides the following regions: China (Beijing) – cn-north-1
This partition requires dedicated credentials, see Announcing the AWS China (Beijing) Region: "Customers who wish to use the new Beijing Region are required to sign up for a separate set of account credentials unique to the China (Beijing) Region. Customers with existing AWS credentials will not be able to access resources in the new Region, and vice versa."
Due to being a non China-based company, we are not currently in the position to test this add-on with the AWS China (Beijing) Region directly. However, the API is compatible in general and this add-on should just work accordingly - please get in touch if things do not work as intended, we are very interested to collaborate on the necessary adjustments.