There is no refund for learning to measure clouds. Snow and cloud measurement in wool belong to this school. The school requires all students to measure clouds in the snow. No matter whether VIP is opened or not, you can check the scores and rankings of each subject in each student's exam. The total score ranks in the class and the total score ranks in the school. Maozhong Cloud Measurement Software is a learning software specially designed for the education industry, with accurate data analysis. Cloud measurement is the leader of big data precision education in K 12 field. Opening vip is voluntary and cannot be refunded.