SHANGHAI/BEIJING (Reuters) -In a sprawling warehouse in a Shanghai suburb, dozens of humanoid robots are manoeuvred by their operators to carry out tasks like folding a T-shirt, making a sandwich and opening doors, over and over again. "Just imagine that one day in our own robot factory, our robots are assembling themselves," said Yao Maoqing, a partner at AgiBot. The importance of humanoid robots to Beijing, as it looks for solutions to pressing issues including trade frictions with the U.S., population decline, and slowing growth, was underscored when Chinese President Xi Jinping inspected AgiBot's robots in Shanghai last month.