Hua Predicts Purge Across China in'77
Hua, in natl farm conf speech, discloses that China will purge party and govt officials who won their positions through connections with Chiang Ching and other disgraced Politburo members; adds that congresses would also be held in '77 in provs and cities to elect new revolutionary coms or local govt bodies; says purge of sr leftists would continue as 'central task for '77' and indicates that there would be further disclosures of misdeeds by group; says that because of pol turmoil, nation's econ performance in '76 was weak; illus (M)
