The intention of
Marx and Engels' “span” theory doesn ' t refer to that the traditional village of Russia may enter socialism
directly,b ut in the special international and domestic situation,village may be developed by a special noncapitalist road and practice socialist
transform with the help of proletariat who had won in the West.In the 20th century,some backward country such as USSR and China eatered socialism firstly,who had different internationa l and domestic situation from the Marx and Eugels' idea.So it can't verify that the theory is correct or not.The practice of the contemporary socialism proves that the development pattern of human society may span a certain stage,but the transform of social productivity and labor pattern can't be spanned.To understan d Marx amcl Engles' thought correctly and summarize the development experiences of contemparary socialism can help as to grasp the law of socialist constructio n i n the backward country and do well in the the construation of the Chinese charae teristic socialism.