Terraform provider mirror for China

Dear community,

We are using terraform in AWS CodeBuild to setup a AWS environment in AWS China (Ningxia). To increase a really bad bandwith when downloading files (up to 7-8 min for 32 MB) we already load terraform cli from a S3 Bucket where we cache it.
The problem is, that the aws provider, is still downloaded via the HC provider CDN.
Is there any type of mirror in china for downloading the provider?

Thank you in advance,
Björn