It seems that this statement is not very accurate. I guess you mean the four major websites of the thesis database, that is, there are four websites, which are relatively large and can also retrieve published papers. These four websites are China Knowledge Network, namely CNKI, Wanfang Database, VIP Network and Long Yuan Journal Network. Among them, HowNet is the most authoritative and persuasive, followed by Wanfang Database. If the published papers are included in HowNet, they can be retrieved in HowNet, indicating that they are more formal, the evaluation of professional titles is useful, and other authorities are decreasing in turn. In addition, there is a relatively small paper knowledge website called Tao Tao paper net, which contains a lot of paper writing knowledge and publishing knowledge. I suggest you read the above article before publishing it, which is more practical.