According to the video query of iQiyi, in the TV series "Gone with the Wind", he is a doctor and classmate of Song. When the plot developed to episode 2 1, Luo Songsong and Lin met in the restaurant and introduced each other. Lin regarded Luo Songsong as a good friend and exchanged contact information with him. Later, Luo Nanchu got Lin's contact information and knew his identity information. This shows that the information about forest identity was learned in episode 2 1 of the play.