I would recommend you to buy a USB-C to Displayport cable like this (
https://www.amazon.de/StarTech-Disp...49201&sr=8-1&keywords=usb+c+displayport+kabel) or a USB-C to Displayport adapter (
https://www.amazon.de/Club-3D-Displ...=1486249179&sr=8-3&keywords=usb+c+displayport) and use a normal DP cable.
There are 2 points because of which I wouldn't recommend you to go the HDMI route.
1) In the first review I found on your Monitor it says there's no HDMI 2.0, so only 30hz 4k over HDMI...
2) USB-C doesn't support HDMI 2.0 so these are always "active" adapters which use the Displayport Alt-Mode and convert the Displayport signal to HDMI.
F your Display should support HDMI 2.0, I wouldn't recommend to use it, you would have to use the alternative Mode translation Route with eiither - if you're lucke - the 4k60 in the "option" resolutions or you will have to get the timing of your Display from the EDID and set it right with SwitchResX (with the Club3d USB-C toHDMI 2.0 one).
Or you buy a Displayport cable and get 4k60 as a native resolution without hassle...