[Urgent] Does everyone know the name of this novel?

It was an ancient romance novel. They were martial siblings. When the female protagonist first saw him, she thought he was a woman.(Because the male protagonist was especially beautiful, even more beautiful than the female protagonist), she wanted to tease him and play with him. For several years, the male protagonist didn't speak. Later, the male protagonist went down the mountain and said the first sentence. Only then did the woman know that he was a man (it seemed to be so). Later, the woman also went down the mountain and pretended to be a man to be an official in the imperial court.(She and the male protagonist are in the same hall and the officials recognize each other) The first time a woman went to court, she laughed at the male protagonist in public for being too beautiful and let the male protagonist spank her butt in the hall (Fighting is similar to both martial arts, and the male is better). The female character is lazy and strong. I urgently need this title, thank you!!