The bottom of the Huawei MateBook X Pro makes a creaking or squeaking noise when you lift the laptop by a bottom corner.
The noise is not caused by the laptop’s body but by the crinkling of the battery’s wrapping. You are exerting pressure on the battery area, slightly bending the bottom panel and pressing the battery.
Warning: this will most likely void your warranty. You are liable for any damage to your device.
Peeling off the battery wrapping gets rid of the noise. To do this, you should first remove the big heatsink plate so that you can gently disconnect the battery from the motherboard.