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The world’s longest sea bridge, Hong Kong–Zhuhai–Macau Bridge (HZMB) was officially opened on Tuesday (Oct 23) by Chinese President Xi Jinping, linking up Hong Kong, Macau and the mainland’s River Delta cities to form the Greater Bay Area. In the mega project, about 200 sets of Kehua UPS system was installed in the substations of the east and west artificial island and the port artificial, working in the harsh environment of high temperature, high humidity and corrosion, which poses a comprehensive challenge to the Kehua’s product quality.