WhVt's_g0od_k0r3A's feed

Wth was that ending? Lmao
It's like the author just gave up on it halfway through the end, like what was said on the letter?, why was there blood near it? how did they give the cure to the people, who was with her sister, that she lived that long? [There's no way a class can just live peacefully without betraying each other], how did they get rid of the zombies? What happen to jin han?
There's so many things unanswered