Sina is an antique romance novel, which tells the story of the twists and turns and hardships experienced by the heroine Yang Zhao in the process of finding her long-lost brother An An. In the novel, An An's identity is revealed as Yang Zhao's own brother. He was separated by being trafficked when he was a child, and was found many years later. The mystery of Ann's true identity is an important plot in the novel. Through the emotional entanglements between Yang Zhao and An An and the hardships they experienced, the complexity of human nature and the impermanence of fate are revealed. At the same time, the novel also expresses deep thoughts on affection, affection and love through the growth process of Yang Zhao and An An.