The Old China Trade was the name given to the early commerce between the Qing Empire and the United States under the Canton System, spanning from shortly after the end of the American Revolutionary War in 1783 to the Treaty of Wanghsia in 1844. The Old China Trade represented the beginning of relations between the United States and East Asia, including eventually U.S.China relations. In Salem, Massachusetts there are important examples of American colonial architecture and Federal architecture from the Old China Trade in two historic districts, Chestnut Street District, that is part of the Samuel McIntire Historic District containing 407 buildings and the Salem Maritime National Historic Site, consisting of 12 historic structures and about 9 acres (36,000 m2) of land along the waterfront in Salem, Massachusetts.