@torchmedia @dronefriend, I have one 4K version on my hand right now and I have installed 10.13.4 on it.
I had hard time to install 10.13.4 on it: I was stuck at formatting the macOS partition to APFS, but somehow I worked around it and am able dual booting Windows and macOS.
I can get into the desktop without fully enabling the graphic card right now with its Intel HD 620. (shown as HD 630 with invalid framebuffer 0x12345678 in macOS)
I will do more tests when I have time, including its AMD Radeon RX Vega M GL. I'd be glad to have companions working around this laptop with me. It seem right now, the laptop is very doable. Even if the AMC card doesn't work, I would still be very satisfy, because this laptop is really a beast!