Not electronic documents, of course. HowNet and VIP provide books and materials in various periodicals, magazines or printed editions. When downloading, you can see the original source of Chu literature, and then indicate the nature of the reference literature according to the original source.

However, it should be mentioned that HowNet has jointly launched digital priority publications with a number of academic journals. If it is a document with priority digital publication, if you download and quote before printing a paper periodical, it should be regarded as an electronic document, and the manuscript with priority digital publication corresponds to the manuscript in the official print edition one by one. However, priority digital publishing has just begun to be put into use. I guess the files downloaded by the landlord should still be electronic versions of traditional paper periodicals and books.

If there are still unclear places, the landlord can contact me again!