The Legend of Douluo's Broken Sword

Bai Qinghui was a mercenary in her previous life and died in an air crash. He was accidentally reborn in the Douluo Continent with a broken knife. He obviously just wanted to live in peace and stability until he was old. However, the unexpected happened. His sister died tragically in the battle between Tang Hao and Wuhun Palace. "Okay! What a Qianxunji, what a Tang Hao!" This book has a single female protagonist, no harem, and no stud.