China's state secrets protection agency has warned citizens about foreign spies using various disguises, including wedding photographers near military sites and researchers collecting data under the guise of autonomous driving technology. The warning highlights potential espionage threats.

Foreign spies in China have disguised themselves as wedding photographers near naval ports, or have collected mapping data using advanced radar and GPS optical lenses mounted on cars under the cover of autonomous driving research, according to China’s top body protecting state secrets. The National Administration of State Secrets Protection warned of foreign spies’ “eyes in the dark” in its latest anti-espionage documentary aired on CCTV national television on Tuesday. “In real life, the...