SHANGHAI / SUQIAN, Jiangsu Province, China (Reuters) — Bright red, grey and black, they are the robot postmen of the future, and are controlled from a command center 40 kilometers (25 miles) away by e-commerce giant JD.com. Online retailers Alibaba, JD.com and S.F. Express have been investing in drone programs they hope will one day perform so-called last-mile deliveries, especially in hard to reach rural areas. Others, like delivery firm BEST Inc, have begun testing […]