Currently, many devices designed to use the USB plug, an USB plus-in may needed extremely. Gonglue Jian - a young chinese design student - bring us a new choice to solve the defficulty of lacking USB ports on some computers (MacBook?). His idea about USB plugs is really interesting, if all USB devices are designed the plug like this, allow some USB multitasking like this - by faciltating all the devices one by one- maybe there wouldn'd any limitation of the USB port anymore.