Thank you very much!
you help me a lot!
It still has the 5 language screen, but no other issues.
I have questions on: how to make the thunderbolt 3 and HDMI work?
and how to change the key about the backlight?
Now I can use F6 to reduce light, but I don't know how to turn up light. Also it needs to be F11 to turn down, and F12 to turn up, can you give me a solution?