Before A'TIN was announced on November 2, 2019, there was an unofficial fandom name called "AURUM" the Latin word for gold and the source of its chemical symbol, "Au".
Aurum is not a fandom name but a group of people supporting SB19. Before SB19s debut, Aurum already existed. It was misunderstood by fans so Aurum was spread and called as SB19's fandom name.
☆Meaning behind our "A'TIN".
A'TIN "There's no 19 if there's no 18" ATIN means ours. AURUM'sb9TIN
There is an apostrophe ( ' ) after "A" in A'TIN. Sejun said that Aurum will never die and it will be forever in their hearts so they put an apostrophe after A remarking Aurum in A'TIN. The meaningful AURUM is still part of our fandom name and A'TIN without AURUM is actually nothing. A'TIN becomes more meaningful because of AURUM. That is how thankful our SB19 is. They know how to look back where they started and humbleness in them never fade.
And I am proud to be part of "A'TIN with AURUM" or "A'TIN without S" #PPopWorldInvasion 🇵🇭