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Data generated from past analysis.
http://www.xueyinyue.com/
https://www.sohu.com/a/615912373_121124780
https://core.ac.uk/download/41459845.pdf
https://www.bilibili.com/video/BV15P411m7Po/
https://www.instagram.com/_gua_hua/
https://k.sina.cn/article_1758904723_m68d6c1930330172j0.html?cre=tianyi&mod=wpage&loc=13&r=0&rfunc=85&tj=cxvideo_wpage&tr=214&wm=6090
https://www.jianshu.com/p/42e20703e809
https://www.163.com/dy/article/GUE5PTGL0536BJTZ.html
https://www.sohu.com/a/273134084_668695
https://www.youtube.com/playlist?list=PLdZtTixdbSbo8U8ZlUegTW2_Jo_1xV0nm