Does this HotelESIM work in Macau or Mainland China when traveling from Hong Kong?

The HotelESIM plan for Hong Kong is specifically designed for use within Hong Kong SAR only. While Macau and Shenzhen (Mainland China) are popular day-trip destinations, they operate under different telecommunications networks, and Mainland China has its own internet regulations (the Great Firewall). If your itinerary includes visits to the Greater Bay Area, which encompasses Hong Kong, Macau, and parts of Mainland China, we highly recommend considering a regional HotelESIM plan that covers all your intended destinations for uninterrupted connectivity.