The success of the Communist Revolution stripped modern Chinese literature of its urban component. Most literary historians agree that the May Thirtieth incident marked a crucial turning point: modern Chinese literature moved, in the memorable phrase of Ch'eng Fang-wu, from ' literary revolution' to ' revolutionary literature'. The leadership of the league of Left-wing Writers consisted nominally of an executive committee of seven standing members: Hsia Yen, Hung Ling-fei, Feng Nai-ch'ao, Ch'ien Hsing-ts'un, T'ien Han, Cheng Po-ch'i and Lu Hsun. The seven-year record of the league was one of continuous debates against all kinds of ' enemies': beginning with Lu Hsun's polemic with the liberal Crescent Moon Society, the league combated successively the conservative proponents of 'nationalist literature', the left-leaning 'third category' writers, and finally some of its own members in the debate on' mass language' and in the famous battle of the ' two slogans' connected with the league's sudden dissolution in 1956.