There are two options for customers in China who want to use the Power BI service.
The Power BI service is independently operated and managed by 21Vianet for Chinese customers. 21Vianet stores Power BI service data in China, as per our trust center. You can read more details and sign up here.
Alternatively, the Power BI service is available from Microsoft in our global, commercial cloud including local currency (CNY) pricing for Chinese customers. Data is stored in the closest Power BI commercial cloud region based on tenant country which, at the time of writing, is the Asia Pacific region for customers with their tenant country set as China (see the trust center for details).