How Did Carl Marx Reform the Dialectic of Hegel

How did Carl Marx reform the dialectic of Hegel? Carl Marx repeatedly stressed that philosophy of Hegel was the philosophy that reverse the facts or stand facts on their head. Through studying hard the thought of dialectic of both Hegel and Carl Marx, the article believes that Carl Marx finished reforming the dialectic of Hegel through three parts. He first reversed the subject and medium and then theory structure of Hegel' s dialectic.