On December 15th, 2021, the mobile fixed skin cleaning machine developed by BRI was successfully tested in Changsha South EMU station. As you can see from the video,before cleaning, the outer skin of the EMU trains, especially the skirt area, was already dusty and dirty after long hours of driving. After the cleaning, the outer skin and the skirt of the EMU trains were very clean. The contrast between before and after cleaning was obvious and it achieved the expected result, which was approved by our customers . The entire cleaning time is less than 5 minutes, very precise and efficient!