AWS IoT Core - CoDevelopment Europe - China

Hi, The IoT devices are deployed in Switzerland and Beijing Regions? If this is the case, you will need to use IoT core in Chine Region for the China IoT devices and IoT Core in Switzerland (or Europe Region). Take in consideration that account permissions for AWS Global Regions are different from account permissions for China Region and there is no interconnections between Global Regions and China Region. Please refer to this blog for more details about China Region operation: https://aws.amazon.com/blogs/enterprise-strategy/getting-started-with-aws-services-in-aws-china-beijing-region-and-aws-china-ningxia-region/ If only the development team is in China, and you only need then to access the environment deployed in Europe (IoT Core functions), as long as they have internet reachibility to the Region (outside china) where IoT Core is deploy and all IAM users, policies, they will be able to login.