The idea is simple and ingenious, just as the idea of equipping a suitcase with wheels was simple and ingenious. The wheel was one of the first inventions in the history of humanity, but, strangely, those who remember the Fifties and the fatigue of travelers in carrying around heavy suitcases are amazed at how no one had thought of putting wheels at the bottom of the suitcases at the time. But at some point the light bulb went on and porterage became a museum profession.
Another light bulb went on for He Liangcai, a modest Chinese farmer from Hunan (province in central China), who patented a suitcase that not only has wheels but also an electric motor: straddling the luggage, the traveler it can travel for 2-3 hours at a maximum speed of 20 kilometers per hour. It took He Liangcai ten years to perfect his invention; in fact, as a Chinese saying goes, it takes ten years to sharpen a good sword.
