The ending of " Return of the Undercover " was that Baoyu successfully returned from undercover, but he found that the undercover mission was not as simple as he imagined, and the process of undercover was also full of danger and risk. Baoyu and the undercover team had a fierce struggle, and finally Baoyu successfully completed the task, but he also deeply realized the complexity and danger of undercover work and decided not to do this job. After the undercover mission was completed, Baoyu and the undercover team returned to Hong Kong. Baoyu introduced his identity to the undercover team and helped them expose a major drug trafficking case. In this process, Baoyu also deeply realized the importance and danger of undercover work. At the same time, he also understood his past mistakes and decided to start his life anew.