The regional requirement for NMPA certification in China involves ensuring that medical devices meet national standards set by the NMPA, rather than regional standards. However, there are key aspects to consider:

1. National Standards: The NMPA sets national standards that must be adhered to across all regions of China. These standards cover product safety, efficacy, and quality.

2. Registration Requirements: Devices must be registered with the NMPA regardless of the region in which they will be sold. The certification process is uniform across the country.

3. Local Compliance: While the standards are national, regional variations in enforcement or additional local regulations might exist. Importers should ensure compliance with any local health or administrative requirements.

4. Regional Authorities: In some cases, local health authorities might have specific procedures for import and distribution, but these should align with NMPA regulations.

5. Documentation and Testing: The required documentation and testing must meet national criteria, and the certification is valid throughout all regions of China.

In essence, while the NMPA certification process is standardized, staying informed about any regional nuances or additional requirements can help ensure smooth market entry.