Does WeatherKit transfer user latitude/longitude outside Mainland China? (Data residency question)

Hi everyone,

I'm integrating WeatherKit into an app for users in Mainland China, and I have a data residency question I haven't been able to resolve from the documentation.

To fetch weather data, the app sends the user's precise latitude/longitude to WeatherKit. Under China's Personal Information Protection Law (PIPL), precise geolocation is personal information, and cross-border transfers are strictly regulated — so I need to understand where this data actually goes.

While testing on Android (REST API), I captured the outbound request and it connected to an IP that appears to be located in Mainland China. That's encouraging, but a single edge/CDN IP doesn't prove the data stays in-country — it could still be forwarded to or accessed from servers outside Mainland China.

My questions:

1. When a request originates from Mainland China, does WeatherKit process and store the latitude/longitude within Mainland China, or is it transferred/accessible outside?
2. Does WeatherKit have a data localization deployment for Mainland China (similar to how iCloud is operated locally there)?
3. Is there any official documentation on WeatherKit's data residency and request logging (IP, coordinates, retention period)?
4. If anyone from Apple or the community has insight — or can point me to the right documentation — I'd really appreciate it.

Thanks!