The reason why the third grade mathematics in the cloud platform of primary and secondary schools has not been updated is because the textbook belongs to the People's Education Edition and is being rectified. The electronic version of primary school mathematics textbooks published by People's Education Publishing House has been removed from the cloud platform of primary and secondary schools, and the Ministry of Education has instructed People's Education Publishing House to rectify it immediately. Real-time update of other versions of cloud platform for junior high school mathematics.