This spring, the Chinese authorities will launch the country's environmental zones, the first of which will come into force on April 1st. Starting then, vessels which call at ports by the Yangtze River Delta, including Shanghai, will have to use low-sulfur fuel when they are berthed at the ports, according to an update from marine insurer Skuld which cites the Chinese Ministry of Transportation. The Yangtze Delta is the first of the three areas, where vessels in the future may not have sulfur emissions of more than 0.5 percent.