There is no solution, no other way. You can only slowly tear it off.
Heat the plastic plate at first (Baking it on fire. Note not to put it too close to the fire, otherwise the plate will be out of shape; Or putting it on heating radiator for a while; Of course if it's summer, you can just put it under the sun.). And then slowly pick up one cornor with your nails and tear it off. Roll it while tearing it. You can grasp the film when you roll it for 6 or 7 times. And then tear off the whole film. The key point is patience. If there's a part where the glue is too sticky, stop pulling and dig it with your nails. Remember not to pull it too hard.
