I Have a Sword to Kill Evil Spirits

My name is Li Min. I was once a female swordsman from the Lingyun Sect with a stunning sword. Now I am a high school student with the lowest grades in the No. 2 Middle School in G City and relying on my grandma to pick up scraps to support me. In my previous life, I was surrounded by demons. After I came to this world, I found that there were evil spirits hidden everywhere. When other warlocks were still casting spells to exorcise evil spirits, I raised my hand and struck out with a sword...