The Shanghai Maritime Safety Administrations (MSA) has issued a sketch map of the waters comprising Shanghai Port which outlines the Emissions Control Area (ECA) for navigating ships. As of 1st October 2018, all vessels on international and domestic coastal voyages are required to use fuel with a sulfur content of up to 0.5% m/m, while navigating and berthing in Shanghai Port.
On the occasion, the American P&I Club issued a translation to the map, with help from Hai Tong & Partners, Shanghai,...
https://safety4sea.com/american-club-clarifications-on-shanghai-eca-map/