Who is watching the surveillance at the end of Jianghu Children?

The ending of "Jianghu Children": Jojo's prison moved to Shuozhou, away from Datong. Five years later, Jojo was released from prison. She desperately searched for the whereabouts of Guo Bin, during which her wallet was stolen on the Three Gorges ferry. In order to survive, she tried to extort money from the rich in high-end hotels. By contacting Lin Jiadong, Jojo finally knew the whereabouts of Guo Bin. However, Guo Bin refused to see her. Lin Jiadong's sister Lin Jiayan told Jojo a cruel fact-Guo Bin has been with herself. Jojo went to the police station and forced Guo Bin to appear in court. Guo Bin finally appeared, but she didn't love her anymore. Jojo accepted the fact that things had changed and walked across the brazier. Unfortunately, they broke up.