1 original text of a chapter in the book: directly retrieve the book from the library or CALIS online bibliography, and then find the original chapter from the book.
2. Original log. Use CNKI\ VIP \ Wanfang to find domestic periodicals, and use the core database of foreign periodicals to find out which subject field it belongs to. Comprehensive foreign language databases and professional foreign language databases are generally on the home page of your school library, so I won't list them one by one here.
Master the original text, the original text of the meeting, and also use the database.
4 patent documents, using patent websites.
Laws and regulations, national policies, business norms and other national government websites are readily available. You can directly enter search terms in Baidu to search, and then further narrow the search scope.
There are other ways to retrieve the original text, such as yearbooks and encyclopedias.