be careful, Huion used glue to secure the parts together.

The parts are glued somewhere near the red line.

Take the pen and bend it ever so slightly on the red line. Rotate the pen a bit and bend it again.

After one full rotation, take the botem and top part of the pen and twist them against each-other. Again be careful.

repeat the above 2 steps on till the top part comes off. I recommend a quit room so that you can hear the clue crack during the bending processes. This takes a whle