The Variation Theory of Comparative Literature (Bijiao Wenxue Bianyixue) <subtitle>By Shunqing Cao, Chao Wang, etc., Beijing: The Commercial Press, 2021, 313pp.</subtitle> <source>The Variation Theory of Comparative Literature (Bijiao Wenxue Bianyixue)</source>. By <contrib-group person-group-type="author"><contrib contrib-type="author"><string-name xml:space="preserve" name-style="western"><given-names>Shunqing</given-names><x xml:space="preserve"> </x><surname>Cao</surname></string-name></contrib>, <contrib contrib-type="author"><string-name xml:space="preserve" name-style="western"><given-names>Chao</given-names><x xml:space="preserve"> </x><surname>Wang</surname></string-name></contrib></contrib-group>, etc., <publisher-loc>Beijing</publisher-loc>: <publisher-name>The Commercial Press</publisher-name>, <year>2021</year>, <page-range>313</page-range>pp.