Organize the required files, put a series in the same folder (folders can be nested), compress them by computer, send them to ipad through QQ WeChat, and receive compressed packages on ipad.
Click on other applications, open the required compressed package on the ipad and save it in a "file". At this point, the file has been stored in Apple's own "File" APP, and clicking the compressed package in the file App will automatically decompress it.
Then open the Good Notes-a new folder (named as needed), click the new button in this empty folder, select Import as the adding method, find the location where the file was previously stored, and click "Select". At this point, Goodnotes will automatically help decompress and import the corresponding files according to the create folder, and then wait.