In April 2024 a brown teddy dog wandered into the Meilong police station in Shanghai and nuzzled an auxiliary officer. Police took him to a clinic, scanned his neck, and found a microchip. The chip's ID — "Tangtuan" — matched the city's dog registry, leading straight to his owner, Mr. Zhang, who said the dog had been missing for two years. The next day Tangtuan recognized his owner instantly. Shanghai police note that a chip plus registration lets a lost dog be found "with one click."