You're welcome. And we don't get much insight into what happened between He Tian and Mo during those 3 years, but from the specials it looks like they're still on good terms. It's probably a similar situation where He Tian has been out of the country for awhile and has returned.
And yeah I think with Zhan and Jian Yi, their relationship had to have a restart because of Jian Yi's sudden disappearance. I'm sure Zhan was hurt by that. But YES he definitely still have romantic feelings for him. But they're once again seem to be taking things a bit slow. Here are a list of the Present/Special chapters (I think these are all of them) -- 68 -69, 224, 271, 313 (All of these are Christmas Special Chapters), 230 and 276 are Valentine Special chapters.
You mean from the official art? Yep i've seen it. Fans have speculated their wedding rings (Or i guess more accurately "promise" rings since China isn't currently about that gay marriage life). The only thing with the official art is that we can't tell how far in the future they are since many of them don't correlate with the Present Day chapters. But one thing for sure, those two are definitely going to end up together <3
Chapters 22 - 50 are in the PRESENT TIME. Zhan Zheng Xi is in College and Jian Yi, who has been missing for 3 years, is now back and apparently living with him(?) as he makes up high school. The only background that we're given is that Jian Yi went missing the 2nd day of his and Zhan's first year of high school.
Chapters 51+ are set in the PAST. They're a flashback to Zhan's and Jian Yi's third year of Middle School (yes they are 15 and middle schoolers so calm your horny down a notch lol). We see the build up of the friendship between the four boys and their individual relationships. Everything we're reading now is building up to their middle school graduation and eventually the day that Jian Yi disappears.
EXCEPTIONS -- Some of the SPECIAL Chapters, such as Ch. 224 - The Christmas Special, are also set in the PRESENT. Which is why we see that the boys look a bit different, and in this specific chapter Jian Yi mentions that everyone else is in college but him (bc he has to make up high school).
As things have developed I'm sure the creator probably didn't realize this would be such a BIG project or so popular so they've probably have added and developed things in the PAST chapters, that don't translate well to the PRESENT chapters ( such as Zhan's Present personality in the early chapters being a bit more snappy and irritable, while his current Past personality actually shows him be a bit more laid back and mellow). DON'T look too much into it. Just enjoy things as they develop. The author may go back and revise the Present chapters to match things up a bit more.