Was the protagonist of this novel famous for using poison?

I recommend the following two novels to you: The protagonist was a martial arts genius and a poison expert. He accidentally became the school belle's bodyguard when he was looking for his little sister. He practiced ancient martial arts, destroyed powerful enemies, and became a respected person in the city. "Famous Poison Doctor"-The protagonist was a modern female doctor who was proficient in the art of Qihuang and was good at using poison. She was reborn in ancient times, using poison relentlessly, managing medicine fields, managing farms, playing with famous families, and living freely. I hope you like this fairy's recommendation. Muah ~😗