FUTURE OF THE EMPIRE Under the Manchu dynasty this anomalous system had enormously increased the trade and prosperty of the Treaty Ports, from which the (international) Chinese Customs Service collected most of the revenues by which the Imperial Government was supported. But after the Revo- lution of 1911 Republican China soon began to claim the sovereign rights of a modern power, and to demand the abolition of the "unequal treaties", which gave foreigners a position so derogatory to Chinese sovereignty. In conse- quence of this agitation many of the minor con- cessions (though not Shanghai) were evacuated, presumably because their commercial value had been greatly impaired by the perpetual welter of civil wars which was the new regime in China. Meanwhile, in the north Japan was extending her political and economic influence year by year. In spite of the "OpenDoor" promises and treaties, China is being absorbed bit by bit, and European traders are finding that they have less and less chance of competing with the Japanese. Nothing short of a coalition of Britain and America to 88