The virtual Xinutop VBox has exactly the same fonctionnalities than the "real" Xinutop;
reset factory, languages, add/remove progs, serial and USB ports, etc...
To run a *.vdi image, simply create a new machine, add this virtual disk file and configure the virtual hardware as needed.
The native display resolution is 800x600. You can obtain others resolutions installing VBoxGuestAdditions.
You will get some errors at reboot but the essential VBox display driver run.
The dynamic virtual disk can extend until 4Go.
Enjoy !