Does this CoreESIM plan also function in Hong Kong and Macau?

The geographical scope of your CoreESIM plan is precisely defined in its specifications. A plan designated solely for "Mainland China Only" will not provide connectivity in Hong Kong or Macau, as these are distinct administrative regions with separate network infrastructures. For itineraries that include these territories, CoreESIM strongly advises selecting a specific regional plan that explicitly covers "China, Hong Kong, & Macau" or acquiring individual eSIMs tailored for each location to ensure uninterrupted service.