Foreign spies have posed as wedding photographers near naval ports and used cars fitted with advanced radar, GPS and optical sensors to collect mapping data under the guise of autonomous driving research, China’s top state secrets watchdog has cautioned. The National Administration of State Secrets Protection’s warning about foreign spies acting as “eyes in the dark” came in its latest anti-espionage documentary, with state broadcaster CCTV airing the first episode on Tuesday. “In real life, the...