This article takes Bai Qi (Bai Mingyou) as the protagonist, and the background is the late Ming Dynasty and early Qing Dynasty. When he was a child, he formed a deep friendship with his senior brother Yu Yi (Yu Yunsi), and the love story gradually evolved. Later, he learned from Yu Yi that he was a Jurchen, and finally expressed the entangled thoughts of a broken sleeve and the endless thoughts between nations and nations.