I have an Alfawise Z1 (2/16) and there was a problem under CE, the BT remote OK button cant working only when i switch to mouse mode. With this little mod i able to use as expected.
First, create /etc/udev/hwdb.d/10-btok.hwdb file and fill with:
Save, reinitialize hwdb and reboot system:
The remote controller use the following codes: