Proof, fair a experiment

[MichaelAnamy]

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https://bbs.pku.edu.cn/v2/jump-to.php?u ... ther-76585
http://ezproxy.cityu.edu.hk/login?url=h ... er-6-26022
http://ezproxy.cityu.edu.hk/login?url=h ... rt-1-42199
https://bbs.pku.edu.cn/v2/jump-to.php?u ... rt-3-63305
https://bbs.pku.edu.cn/v2/jump-to.php?u ... tice-33824
https://bbs.pku.edu.cn/v2/jump-to.php?u ... ssage-6501
https://bbs.pku.edu.cn/v2/jump-to.php?u ... rt-1-80723
https://bbs.pku.edu.cn/v2/jump-to.php?u ... -two-58112
http://ezproxy.cityu.edu.hk/login?url=h ... sty2-97628
https://bbs.pku.edu.cn/v2/jump-to.php?u ... -sam-77559