what can i do for my classmate?

so, i have a classmate who's been showing very obvious signs of self-harm in her statuses, oftentimes with pictures of sharp items or uncolored photos of bloody tissues, paired with captions like "new sesh today! rusty razor btw 👀"

im in a traditionalist chinese school, and i heavily doubt they'd have the necessary mental health support/understanding to help her. after all, they literally yell at their kindergarteners for crying and force them to stand in corners for no reason.

i've already told my concerns to my main teacher and NOTHING has happened. i don't wanna overthink too much, but there's either 1 of three possibilities

1: they don't care.

2: they've forgot

3: they're doing something but it's taking way too long.

all they responded with was "We're looking into it, thank you" roughly translated.

i'm a few weeks clean and everytime i look at her statuses it breaks my heart. it gives me distressing, often graphic/nauseating flashbacks and memories of back when i used to sh way more.

my parents also don't care much about MY mental health considering they've literally left my blades alone in the drawer when they were reordering my room? everything in the drawer was reordered so they knew and intentionality kept them there. also had bloody tissues on said drawer. so probably not the best idea to tell my parents about her as well.

she's probably i self-harm communities aswell, considering she knows the terminology and culture around it. so if you're seeing this

i wanna say i care about you. i just haven't been talking to you because i'm scared. maybe that's foolish, but what else can i do? and yes, this is me. im the classmate who likes philosophy and presented about the four temperaments.