Reborn as a Ruthless Top Student

[Alternate world + rebirth + strong heroine] This is a world where knowledge is revered. Evil plants threaten humanity's survival, and people can only fight them by continually studying and expanding their knowledge. In her previous life, under the tutelage of her stepmother, Liang Xiao became someone everyone despised. She spent the rest of her life cast out of the family by her own father, and eventually met a gruesome death far from home. Given another life, Liang Xiao binds herself to a Knowledge System. She thought the System was a shackle that would shorten her lifespan, but it turns out to be a golden finger. She uses the martial arts she learns in mission worlds to challenge opponents above her level, the foreign languages she learns to face-slap those who want to see her make a fool of herself, and the medical skills she learns to save lives... Everyone knows that Liang Xiao, once a dunce, is becoming more and more like a top student. But why does she also seem to be growing increasingly ruthless? Those who want Liang Xiao on her knees are hiding from her the next day, clutching their legs. Those who want to humiliate her end up getting slapped in the face themselves. And the people who hurt her in her past life are already buried in the ground.