Proof, precisely a experiment

[Michaelwet]

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https://bbs.pku.edu.cn/v2/jump-to.php?ur...lley-47047
https://bbs.pku.edu.cn/v2/jump-to.php?ur...wins-15252
http://ezproxy.cityu.edu.hk/login?url=ht...erly-55464
http://ezproxy.cityu.edu.hk/login?url=ht...-far-21193
http://ezproxy.cityu.edu.hk/login?url=ht...fter-54798
http://ezproxy.cityu.edu.hk/login?url=ht...t-ii-16173
https://bbs.pku.edu.cn/v2/jump-to.php?ur...er-4-18818
https://bbs.pku.edu.cn/v2/jump-to.php?ur...ions-35693
http://ezproxy.cityu.edu.hk/login?url=ht...reen-23085
https://bbs.pku.edu.cn/v2/jump-to.php?ur...-maid-9361