Marx's conception of practice was first influenced by Hegel,inheriting and criticizing Hegel's speculative philosophy from the point of view of theoretical criticism and political criticism,and initially presenting his own conception of practice;subsequently,under the influence of Feuerbach,he inherited and criticized Feuerbach's humanism in terms of alienated labor and a different outlook on the world,and developed practical materialism;finally,in the mature and perfected phase of his conception of practice,he emphasized the combination of theory and practice,valued the primacy of practice,and devoted himself to changing the world.The practical mission of emancipating mankind thus constitutes a complete development of Marx's concept of practice.