BPI R2 Pro EMMC Boot Loader Problem

Hello , I have a Banana Pi R2 Pro right now, I installed Rockchip USB driver and Rockchip USB Download Tool as described in this link ( https://wiki.banana-pi.org/Getting_Started_with_R2PRO ) . My device showed up as MASKROM in RKDevTool. Then I tried to install the debian version in this link ( https://drive.google.com/drive/folders/1LSJlHtkHC_Ua6zVgVI3BRJOVPUb6vWO6 ). However, I couldn’t load it. Can you help me how to install it? Have a good day.

With kind regards…