Group announcement or group file sharing. According to the education newsletter, the answers after class of the National Smart Education Platform are shared in group announcements or group files. Open the mobile App, log in to your account and find your own class. The teacher will put the answer in the group announcement or the group shared file. The national intelligent education platform, namely the national intelligent education public service platform, is a comprehensive integrated platform for providing national educational public services under the guidance of the Ministry of Education of People's Republic of China (PRC) (China) and sponsored by the Education Technology and Resources Development Center of the Ministry of Education.