What's the difference between the 625 Senior Mathematics (B) of East China Normal University and the National Mathematics II? Which is more difficult? Can I read the postgraduate entrance examination materials of Math II? One is self-proposition, and the other is national examination, each with its own difficulties. You can review the information you can find in Math II step by step. You need to find the high number B and the direction of the self-proposition. Of course, you can read the materials of Math II, but in the end, you must go back to the designated textbook, thoroughly understand the textbook, and do the exercises several times after class.