On the outskirts of Beijing, young Chinese entrepreneur Cheng Hao sits on an indoor soccer pitch – but this turf isn’t for humans. It’s where engineers working for his start-up, Booster Robotics, ...

Another engineer guided a robot as it walked around a mini-size indoor soccer field, often pausing to closely inspect its components. The team at Booster Robotics was preparing for RoboCup, a major ...