Yang Xinyi is the wife of Jiang Baomin's elder son, making her Jiang Jianchun's sister-in-law. She overheard Jiang Jianchun expressing regret about celebrating Jiang Ruan's birthday, fearing police suspicion if Jiang Ruan disappeared. She reports this to the criminal investigator, citing fear for her own son's safety given the presence of six human traffickers. She is courageous in speaking truth despite family pressure.
