Is There Anything else besides the Great-party Doctrine and the Great-nation Doctrine? ——Talk about the Background of the Great Polemics in the 1960s between China and the Soviet Union

By analyzing and researching some important events in the International Communist Movement after 1956 when the twentieth National Congress of the Communist Party of the Soviet Union was held,this article proposes that carrying out the great polemics is mainly because two parties(the Communist Party of China and the Communist Party of the Soviet Union)had contradictions and conflicts on many issues about theories and practices,and one of the main reasons of causing such contradictions and conflicts is that the Communist Party of China understood and carried out the theories and practice at the angle of Left.