"Fragments of Innocence" is a special refinement material for the event-exclusive weapon Dodoco Tales.
The Teyvat script shown on the page's icon spells:
EYBETRAYYOUYO UMAYJUST BLOWTHEMUPAND THEREFORET HEBESTFRIENDTH ATWILLNEVERTUR NTHEI RBACKONYOUIS▊ MB
Which if properly arranged results in "...(th)ey betray you, you may just blow them up. And therefore, the best friend that will never turn their back on you is...".