Newspapers: more than 640 types, more than 18.1 million articles Yearbooks: more than 5,140 types, 20,000 copies, more than 33.5 million items Patents: more than 23.5 million Chinese patents; more than 100 million overseas patents Standards: The full text of national, industry, and professional standards and a total of domestic and foreign standard references. Patents Chinese patents Overseas patents Standards Standards National standards Industry standards Standard catalogs Enterprise standards Achievements Achievements Academic publications Laws and regulations Government documents Science and technology reports Government procurement Reference books Featured journals Videos Academic journals Dissertations Science. China National Knowledge Infrastructure (cnki) (including journals, PhDs, conferences, newspapers, citations, reference books, patents, economic research platforms, achievement evaluation, etc.) Access portal: Main site (new platform) Brief description: China National Knowledge Infrastructure is a Chinese academic journal.
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