In this world, the soapbox derby design competition is a long-standing children's entertainment event, where participants decorate their cars in various bizarre styles and slide down a slope without any motor power to finish the race. It got its name because the early designs of the cars were made on wooden soap boxes.
There are several important rules for the soapbox derby design competition: first, motors are not allowed; soapbox cars must have at least four wheels; there must be some braking functionality; helmets are mandatory when driving the soapbox car; participants are allowed to give their car a push at the top for extra speed. Of course, other rules are slightly adjusted in different competitions, but overall they are built on these basic rules.
Among these, the Green Bull Cup is the most widely known cup competition in all of Hua Country and even the world.
