It is a fanfic about Murong Chong of Yan Kingdom and Princess Qinghe
The prince who had subjugated his country was tied to the palace pillars, and every night he listened to his sister marrying the enemy king! In front of people, he was Fu Jian's "male favorite", and he was humiliated when he wore women's clothes and performed dances; behind people, he was paranoid and crazy, and only the figure of the emperor's sister Murong Ling could be seen in his eyes. After bloodbathing Chang'an and slaughtering all the people of Qin, what he wanted was never to restore the country, but just to snatch his imperial sister back from that cage! But when the candles in Afang Palace burned out, what was waiting for her was her three-foot white silk. When Han Yan's sword pierced his chest, he smiled - sister, I'm here to accompany you!