A major process contains many contradictions.[4-451] For instance, in the course of China’s bourgeois-democratic revolution, where the contradictions are exceedingly complex, there exist the contradiction between imperialism and the entire Chinese society, the contradiction within Chinese society between the feudal system and the great masses of the people, the contradiction between the proletariat and the bourgeoisie, the contradiction between the peasantry and the petty bourgeoisie[4-452] on the one hand and the bourgeoisie on the other, the contradiction between the various ruling groups,[4-453] and so on. These contradictions cannot be treated in the same way since each has its own particularity; moreover, the two aspects of each contradiction cannot be treated in the same way since each aspect has its own characteristics. We who are engaged in the Chinese revolution [p. 254] should not only understand the particularity of these contradictions in their totality, that is, in their interconnections, but should also study the two aspects of each contradiction as the only means of understanding the totality. When we speak of understanding each aspect of a contradiction, we mean understanding what specific position each aspect occupies, what concrete forms it assumes in its interdependence[4-454] with its opposite, and what concrete methods are employed in the struggle with its opposite, when the two are both interdependent,[4-455] and also after the interdependence breaks down. It is of great importance to study these problems. The principal feature of Leninism is that it is the science which studies the various forms of struggle between the proletariat and the bourgeoisie.[4-456]