@Lunastella
Hmmm...
What I meant was:
MC had told JY once, that there are numerous amount of worlds and spaces/dimensions.
So, for example, in GC's case, rather than going to the past, I think he went to an alternate dimension. MC still alive in her dimension, but there's another her who ended up with GC.
Was she still the same MC? I think not, I believe GC went to the alternate universe instead of went back to the past, because the current MC still existed. Just think of her as MC's twin sister...
It's like there is another you in another dimension, but was he/she still you? Can you really predict the action of another you?
Anyway, that's only my opinion. And also what I thought (to make myself feel better about another MC ended up with another man).
And as for MC's reply "she chose ML in this life". I think it's like...
Take me for example, my friend dislike eating chicken ever since she saw her neighbour killing a living chicken to be cooked when she was still in the elementary school. So if she never see her neighbour killing chicken that day, would she still dislike eating it or not? Perhaps she wouldn't dislike it, or perhaps there would be another time another place where she would saw the chicken being killed, who knows...
Without her memory, MC surely couldn't be sure what's she gonna choose, after all, in her 2nd life, she didn't fall in love with ML.
Also, if you read "Chongfei Manual", in the epilogue, there was an alternate universe where Ah Luo ended up with Li Song.
Was she still the same Ah Luo? I don't think so. This Ah Luo was timid and innocent, different from the Ah Luo that ended up with Zhao Jie. Also I don't think Ah Luo and Li Song would have HEA. This Ah Luo was the uneducated, villager Ah Luo. This Ah Luo wouldn't be capable of household management, I doubt LS's mother and sister would like her and not bullied her, and it's not like LS could protect her 24/7.
And in the next chapter of the epilogue, we knew that Zhao Jie just woke up from a nightmare (in which he saw Ah Luo and LS married), so I'd like to think that ZJ just saw LS in another dimension, there was Ah Luo who married LS and there was Ah Luo who married ZJ at the same time in another place and they existed at the same time. So you could say that they were a different one...
Sorry if this was rather confusing, I'm suck at writing essay and explaining things.