安史之乱使农业生产受到极大破坏，接着又有藩镇割据、宦官专权和朋党之争，使唐朝政局更为混乱。
Agriculture was seriously destroyed ， then vassal states set up separatist regimes by force ， eunuchs grabbed all the powers , parties contended for power and profits , the political situation of Tang was in great turmoil .
朋党之争