Fergus Fung swipes his card across a sensor and waits as his face is scanned by a computer to verify his identity. A steel door opens, and the Hong Kong entrepreneur enters a vault that holds his treasures: bottles of high-end Bordeaux and Burgundy. This is the Hong Kong Wine Vault, where the temperature is a constant 13C, the humidity is 75 percent, and the insulation on the walls, ceiling, and floors is 4 inches thick.
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