I guess they are doing the promotion for Amazon now. So it must be the officially release for the US. https://video.h5.weibo.cn/1034:4618593405698148/4618594162316461
sadly they've kind of ruined any logical sense of a S2 by now based on the source material, because they adapted early and late story plotlines in almost their entirety, while taking little bits of other arcs and mashing them together for short comedic bursts. they've also cut a lot of characters (to give screen time to the teachers), so they can't adapt storylines about those characters either. S2 would probably be fully original and I don't think would be as amusing or well-written as episodes based on the source material.
the last few episodes had a lot of Chinese fans complaining about essentially BL fanservice, so you could go away from watching this imagining/believing two of the characters are together lol