China’s humanoid robot manufacturers on Friday took centre stage at the opening of the 27th China Hi-Tech Fair in Shenzhen, as the demand for these machines in enterprises gathers speed.The fair, which will run through Sunday, has put the spotlight this year on artificial intelligence and robotics innovation.With about a dozen of its products on display at this year’s event, Unitree Robotics drew one of the largest crowds on opening day, as it featured humanoid robots dancing and engaging in...