The Hong Kong-Zhuhai-Macao Bridge (HZMB) is the WORLD’s LARGEST/LONGEST SEA BRIDGE-TUNNEL SYSTEM, which consists of a series of 3 CABLE-STAYED BRIDGES and 1 UNDERSEA TUNNEL as well as 4 ARTIFICIAL ISLANDS (one of them appears in the video) totalling 55 KM that took 9 years to build and 20 billion + USD to complete. It is BOTH the LONGEST SEA CROSSING & the LONGEST OPEN/SEA FIXED LINK the longest open-sea fixed link on earth

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