To Mr Jingyuan Tang I am flabbergasted to find that cyberbullying is allowed in your channel ! Yesterday a member of the audience made a commonplace request for Chinese subtitles, as evidently, he/she can't understand Mandarin, but he was persistently persecuted by another audience as if it is a sin not knowing Mandarin. Subsequently, there were exchanges of comments among several parties, including mine --- I won't deny that. What's scandalous is that the comments left were selectively deleted! Will Mr Tang clarify this?