Proof, very recently a probe

[MichaelGut]

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https://bbs.pku.edu.cn/v2/jump-to.php?u ... rt-1-12463
http://ezproxy.cityu.edu.hk/login?url=h ... nter-60080
http://ezproxy.cityu.edu.hk/login?url=h ... inny-29990
https://bbs.pku.edu.cn/v2/jump-to.php?u ... rt-1-89847
http://ezproxy.cityu.edu.hk/login?url=h ... art-1-6465
https://bbs.pku.edu.cn/v2/jump-to.php?u ... -wish-3261
http://ezproxy.cityu.edu.hk/login?url=h ... room-24744
http://ezproxy.cityu.edu.hk/login?url=h ... -pt-2-2107
http://ezproxy.cityu.edu.hk/login?url=h ... mmy1-53739
http://ezproxy.cityu.edu.hk/login?url=h ... tton-16439