hzmb hong kong zhuhai macao bridge man-made island artificial port china land transport hub snake head undersea tunnel project

bridge hongkong hongkongport hzmb island kong macao macau made man manmade ponte zhuhai artificial port china land transport hub snake head undersea tunnel project feng shui transportation mass bus truck convenience station reclaimed reclamation connection flow traffic culture science logistic remote suburb suburban countryside pollution sea ocean mountain nature economy entrance exit people