8000rpm 2km/h car says to 電訊台 https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.jupas.edu.hk/f/page/3667/af_2019_JUPAS.pdf&ved=2ahUKEwidgM2Jg5LrAhW0IaYKHUvJBQkQFjAAegQIBBAB&usg=AOvVaw32xyxRncxZNN2CAgDBioVa