Tencent Holdings Ltd., a social media and gaming company with a global footprint, slid in US trading on Monday after the Defense Department said the tech firm was a Chinese military business operating in the US.Shenzhen-based Tencent was among several companies that were labeled as Chinese military entities in a Federal Register filing. Contemporary Amperex Technology Co. and Autel Robotics Co. were also included on the roster. Companies on the Chinese military list face delisting from US exchan...