Hello,
I haven't personally tested this configuration but according to the documentation, https://download.lenovo.com/pccbbs..., at the bottom of page 1, it doesn't seem possible. Indeed 4k is not listed as using 60Hz.
I don't know if this helps...
Have a nice day
The list of all manuals is here: https://support.lenovo.com/us...
We have tried this several times. Once it worked (allegedly), but the next time it didn't .... - the desktop was only displayed briefly and then it was black again ... we tried it with a 4K monitor. However, Lenovos run perfectly.
The docking station has its own power supply unit in the scope of delivery. If the laptop can be charged via USB-C, this works without any problems. I use this with the Yoga 910 and it works without any problems.