By Catherine Thorbecke, CNN Business Tech giant Baidu announced Monday that it has obtained permits to operate fully autonomous taxis without any human assistants on board in two of China’s megacities, marking a first for the country. Baidu, which operates China’s largest search engine, said it received the regulatory approvals for its autonomous ride-hailing service Apollo Go to operate on open roads during the daytime in Chongqing and Wuhan. The cities have populations of some 30 million and 11 million people, respectively. The move represents a notable step forward for Baidu and a potential shift in China’s comfort with the...