Does Hikey970's built-in android firmware support 4K display for direct output?

Does Hikey970’s built-in android firmware support 4K display for direct output?
In addition, I have not found relevant information about the NPU computing capacity.
Has anyone had specific parameters or done tests?:grinning:

Hikey970 has max 1920x1080 output over the HDMI.

Why do I read that Hikey 970 supports 4K display output?
Is it necessary to modify the source code?

Hikey970 has no 4K display output.
The Kirin 970 has the ability to produce 4k output but on the Hikey970 board that is not wired up.