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Home-CNKI - 知网 Among them, there are more than 8640 kinds of Chinese academic journals, which includes more than 1970 kinds of core journals of Peking University and more than 4280 first published online journals dating back to 1915 and totaling more than 64million full-text articles
Advanced Search-CNKI - 知网 Advanced Search Usage:>> Advanced search supports the combination of multiple search terms within the same search item using operators *, +, -, '', "", and () The content entered in the search box should not exceed 120 characters When entering operators *, +, -, (), there should be a space before and after them, and the priority needs to be determined by English half-width parentheses If