1 RMB (Chinese Yuan Renminbi - CNY) is approximately equal to 3388.8529 STD (Sao Tome/Principe Dobra). Dobra is the official currency of the two small Portuguese-speaking islands namely Sao Tome and Principe. The symbol of the currency is Db. Dobra replaced the old Escudo was replaced at a rate of 1:1. Cocoa was the major contributor to economic development in Sao Tome and Principe.