You can't. Netease Snail Library is an e-book reader, which mainly provides e-book reading service by viewing the information on Netease Snail official website. Netease Snail Library is not the official platform approved by Eryuan, so it is impossible for Eryuan to directly use Netease Snail Library to brush classes. Users need to log on to the official platform of the second classroom to complete the related courses of the second classroom.