Use a spudger to disconnect the display flex cable.

Prepare an iOpener and apply it to the display for at least two minutes to loosen the adhesive underneath. Especially take care of the upper and lower part.

If your display is broken or cracked protect your eyes from glass shreds apply some clear tape onto the screen to also get a better grip to open the phone.

The display of the Huawei Mate 10 Pro is extremely sticky and you might need to repeat this process during the display removal.