The HZMB offshore car park is mainly used by passengers from the Mainland and Macao who are going to Hong Kong International Airport via the HZMB to transfer to overseas or visit Hong Kong. They are looking for sea water corrosion and oxidation resistant road wide-angle lens in the market, so they have found Tung Wah Optoelectronics to meet their needs. Solution: Because the sea water contains salt, the coating is easily corroded by oxidation. Relying on a number of its own patented coating technology, Donghua has specially customized the wide-angle mirror for decades (conventional wide-angle mirror used in the seaside, usually about half a year will be blurred by mirror oxidation), which escorts the development of the Greater Bay Area.