She Controls Mountains and Rivers

She is the commander-in-chief of the 300,000 cavalrymen in the north. The court said that she was a rooster in the morning, and the enemy placed a reward on her head. She was guarding the border at the age of seventeen and became a marquis at the age of twenty-three. She died under the sword more than the living people the civil servants in the court had ever seen. Until that night, she picked up a man in a rout - his body was covered in blood, but his eyes were like quenched knives. He said his name was Shen Yan and he was a refugee teacher. But she recognized the jade on his waist. That was Prince Jing Shen Yan who disappeared three years ago and was personally named "Kilin Son" by the late emperor. ——And in her hand, she happened to hold a secret decree from the late emperor: Anyone who sees King Jing, kill him on the spot. So the question now is: kill, or keep?