The Segway PT is a two-wheeled, self-balancing electric vehicle. As you can see, the Chinese had to originally deal with the self-balancing problem, but they were able to figure it out. What a genius nation. The Segway PT is a two-wheeled, self-balancing electric vehicle. As you can see, the Chinese had to originally deal with the self-balancing problem, but they were able to figure it out. What a genius nation.