1893-1976 1907-1984 biography china communistleadership contributionsincommunistleadershipmao contributionsincommunistleadership毛泽东 friendsandassociatesmao friendsandassociatessu friendsandassociates粟裕 headsofstate history historyzhongguogongchandang history中國共產黨 interpersonalrelations purgeszhongguogongchandang purges中国共产党 yu zedong