TWRP on Khadas VIM?

Hi Hungphutho,thx for your help, but didn’t work for me.

I put the renamend recovery.img on my sd card, but holding the reset button and powering the VIM on, just let it boot normally into Android.
I can only boot into the upgrade mode

(from here: Burning Tool no Device

5) press and hold power button (far right button,when having VIM in front of you and HDMI output is on left side), you should see on TV/Monitor reboot/power off menu pop up.
6) press reboot button (the one on far left) and release after 1 sec.
7) wait until you see VIM written on your TV/Monitor and count to 5 and release power button")

The upgrade mode is entered perfectly, but I cannot access or use the new (TWRP) recovery.img from my SD card.
How can I boot from SD and use the recovery.img from there? Must it be somehow prepared?

Cheers, Stefan