Japanese gains
Following the outbreak of World War I in 1914, Japan joined the side of the Allies and seized the German leasehold around Jiaozhou Bay together with German-owned railways in Shandong. China was not permitted to interfere. Then, on Jan. 18, 1915, the Japanese government secretly presented to Yuan the Twenty-one Demands, which sought in effect to make China a Japanese dependency. Yuan skillfully directed the negotiations by which China tried to limit its concessions, which centred on greater access to Chinese ports and railroads and even a voice in Chinese political and police affairs. At the same time, Yuan searched for foreign support. The European powers, locked in war, were in no position to restrain Japan, and the United States was unwilling to intervene. The Chinese public, however, was aroused. Most of Yuan’s political opponents supported his resistance to Japan’s demands. Nevertheless, on May 7 Japan gave Yuan a 48-hour ultimatum, forcing him to accept the terms as they stood at that point in the negotiations.
Japan gained extensive special privileges and concessions in Manchuria (Northeast China) and confirmed its gains in Shandong from Germany. The Hanyeping mining and metallurgical enterprise in the middle Yangtze valley was to become a joint Sino-Japanese company. China promised not to alienate to any other power any harbour, bay, or island on the coast of China nor to permit any nation to construct a dockyard, coaling station, or naval base on the coast of Fujian, the province nearest to Japan’s colony of Taiwan.