If you have other Xiaomi bluetooth devices that support gateway, you can get information of ble devices through network/mobile 4G.
For example, there is one device that support gateway from https://www.mi.com/mj-humiture/?cfrom=search, which is a bluetooth based device and has ability to know temperature and humidity of an environment. As you know it based on bluetooth, you can connect it with ble from your phone and it has a distance limit. So if you also have a Yeelight Ceiling light with gateway support, you can get temperature infomation from anywhere if it has network. (Yeelight ceiling light is a bluetooth/wifi multi-module device). Hope this can help you to understand.