The Chinese four-footed robot B1 taught to move on water

New opportunities developers of robot showed B1. Company showed Unitree Robotics how its four-footed robot rolls on itself the person weighing 100 kg, and also comes into water. B1 received protection against water according to the IP68 standard, and it allows it to move on water. It was shown in a roller. And robot completely leaves under water, and over it there is only an antenna. It was still told that robot can move with a speed up to 1,8 meters per second, and on one charge it can work from 2 to 4 hours...