The specific operation is as follows: 1. First, after searching papers from HowNet, check the required documents, then click Export References, then select Endnote as the document export format, and then click Export to download a txt file, which contains some attribute contents of each document.

2. Open EndnoteX8, click File and New to create a new Endnote library file.

3. Click File, Import, and File.

4. Import File Select the txt file just downloaded from HowNet, select Endnote Import as the import option, discard duplicate documents, and click Import.

5. Click Edit to export the style and open the Style Manager.

6. Find China standard GB/T7 1 14 (year of author) and China standard GB/T77 14 (numerical value) and check them. In this way, references in the format of GBT20 15 can only be exported when they are exported later.

7. Click File and Export.

8. Select "ChineseStandardGBT87" as the output style.