Flat, orange robots glide under stationary cars and ferry them to empty Chinese parking bays, using space more efficiently and, their creators say, reducing driver stress. It is one of a number of elegant — and expensive — mechanical solutions China is turning to as it faces an ageing population, which, even in the world's most populous country, is making workers harder to come by. With an eye on the rising numbers of cars on Chinese roads, Hikvision has been testing a robotic parking system in Wuzhen, 130 kilometres (80 miles) west of Shanghai.