I think the author confirmed that it really has no meaning and is a random name.
Wow (⊙…⊙ )
not sure about the name, but i think it's only been 9 days since the flashback started.
http://chensim.tumblr.com/post/154583704669/thefearofthetruth-19-days-timeline-up-until-16
Because, 1 = yi (jianYi) 9= XI (zhanzeng xi) and days = tian (he tian) cmiiw
Wts you talking? 9 is NOT XI （￣へ￣）
This is kinda late but why is called 19 Days? I'm pretty sure this has been a span of over 19 day.... ignore me