The principal traders were the British and Americans, followed by the Germans and Thais. In the 1870s, the principal imports were woolen and cotton goods, iron, and opium and the principal exports were tofu, soybean oil, peas, coarse vermicelli, vegetables, and dried fruit from Zhifu itself, raw silk and straw braid from Laizhou, and walnuts from Qingzhou. The town also traded Chinese liquors and sundries for the edible seaweed grown in the shallows of the Russian settlements around Port Arthur (now Dalian's Lüshunkou District). In 1875, the murder of the British diplomat Augustus Margary in Tengchong, Yunnan, led to a diplomatic crisis that was resolved in Zhifu by Thomas Wade and Li Hongzhang the next year. The resultant Chefoo Convention gave British subjects extraterritoriality throughout China and exempted the foreign merchants' enclaves from the likin tax on internal commerce. Its healthy situation and good anchorage made it a favorite coaling station for foreign fleets, giving it some importance in the conflicts over Korea, Port Arthur, and Weihaiwei.