Hostilities now in progress in the Far East may produce significant changes in the status of foreign concessions and settlements in China. It may be useful, therefore, to classify these areas and to survey their status prior to the present “undeclared war.” Among the several privileges gained by Great Britain, the United States, and France in their treaties with China in 1842–44 was the right of foreign residence in the five ports opened to trade by these treaties: Amoy, Canton, Foochow, Ningpo, and Shanghai. Arrangements for the residence of foreigners and their families in these ports were to be made by the consular officials and the local Chinese authorities acting “in concert together.” These arrangements resulted in the delimitation of areas for foreign residence, generally called “settlements,” which grew into municipalities exempt from Chinese jurisdiction and completely under foreign control. As more ports were opened for trade by the various treaties negotiated after 1844, certain nations requested exclusive areas in many of them. Such areas were generally called “concessions.”