Ailunce HD2 Firmware V3.1.9 Changelog
Added DV QSO mode for DMR worldwide QSO.
Hotspot mode means the radio works as an external MMDVM hotspot device.
Terminal mode means the radio directly acts as a terminal device connected to your PC. You can access the DMR Global TG service directly without an additional hotspot device. 

Operation Guide:  https://www.ailunce.com/blog/how-to-make-a-global-qso-on-the-air-without-a-hotspot