Photo taken on March 22, 2018 shows self-driving vehicles for public road testing in Beijing, capital of China. Beijing released its first temporary license plates for Baidu's self-driving vehicles for public road testing on Thursday. The capital city has opened 33 roads with a total length of 105 kilometers for autonomous car testing outside the Fifth Ring Road and away from densely-populated areas on the outskirts. (Xinhua/Luo Xiaoguang)