The double maze copper lock is a remarkable ancient Chinese invention, used for over 2,000 years. Built from durable copper alloy, it contains two interwoven labyrinths inside, creating a complex mechanism that can only be opened with a precise key. These locks were often used to protect doors, chests, and valuable items—offering both security and a display of advanced craftsmanship. Their intricate design highlights the ingenuity of early Chinese engineering, and to this day, they stand as a sy
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