Against Japan and the European imperialists, America had emerged as the great hope of many Chinese. As the youthful nationalist student Mao Zedong wrote to a friend in early 1917: ‘Japan is our country’s strong enemy.’ Within ‘twenty years’, Mao was convinced, ‘China would have to fight Japan, or go under’. Sino-American friendship, by contrast, was fundamental to the nation’s future. ‘The two Republics East and West will draw close in friendship and cheerfully act as reciprocal economic and trade partners.’ This alliance was ‘the great endeavour of a thousand years’.