Cross-database retrieval interface mainly provides the following retrieval methods for different needs, namely, primary retrieval, advanced retrieval, professional retrieval, author post retrieval, scientific research fund retrieval, sentence retrieval, literature source retrieval and secondary retrieval.

The retrieval methods provided by HowNet platform are as follows: One-box retrieval: As long as you enter the homepage of China HowNet, you can directly enter search terms in the input box for retrieval, which is quick and convenient.

As long as you enter the homepage of China HowNet, you can directly enter search terms in the input box for retrieval, which is quick and convenient. However, the retrieval operation of one frame is simple, and the retrieval result may not be so accurate. Finally, it is common to retrieve thousands of documents.

Professional retrieval: Professional retrieval can provide a retrieval method of combined logical expressions according to the actual needs of users, which can effectively improve the precision. China Knowledge Resources General Database provides CNKI source database, foreign language database, industrial database, agricultural database, medical database, economic database and educational database.