The Chinese remote control nano-bot

You knew it was only a matter of time before this or that R&D branch (China's Shenyang Automation Research Institute, in this case) busted out a nanobot with a arm capable of manipulating matter at an atomic level, also remote controllable by a human-usable interface. Okay, one down; how long until we can create enough for a viscous gray sludge of these nanobots that we might inject them into ourselves?