1 is the time when you received the publication. If you have just received a publication, you cannot retrieve it. General publications will not be included in Wanfang Database until 1-2 months after publication. If you haven't retrieved it for more than 3 months, you really can't retrieve it. If you don't get it back within 3 months, you can wait However, the journal you published itself is not included in HowNet and Wanfang database, so although you published it, it can't be retrieved. For a more specific explanation, you can go to Tao Tao Paper Network, where it is more detailed.