It is because this paper is on one of the biggest question and answer platform “zhihu”, almost everyone feel ridiculous and angry about this paper. So before you think about conspiracy theories， please think about why all Chinese rely similar answers——because it is unfair and double standards(compare to japan). Also, I believe it is so easy to modify the so called “ wallet “, using local languages, leave multiple communication ways, check whether researchers could get wallets back from the desk...It is hard to not believe those authors are woking for political purposes.