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They leap through fire, scale mountains, and even breakdance. But these aren't pets, they're China's newest economic powerhouse – robotic 'dogs'. While real dogs sniff for treats, these machines sniff for survival – detecting gas leaks, mapping collapsed tunnels, and diagnosing power grid faults. CGTN's Liu Jiaxin uncovers how robotic 'dogs' evolved from lab curiosities to a multi-billion revolution in the city of Hangzhou.