Wan Wei volume. The difficulty coefficient of large and small volumes is moderate compared with 53, which may be more difficult to lose than 53, but it is much simpler than the finale. Wan Wei's small volume is the basic problem, and Wan Wei's big volume is the improvement problem. The size of the paper is measured once a week, with special topics and comprehensive questions. The size of the paper is a little simpler than compulsory brushing and on-demand training.