Teachers are not supposed to disclose students info to anyone but the student and that student's parents. Just like medical records. This teacher needs to reprimanded and fired/put on leave until she figures herself out.🤨
maybe gu yin is not gu mang biological sister ? she's why too different from gu mang and gu si .. because both gu mang and gu si is genius but gu yin only know about scheming and hating her sibling