Di Renjie was most touched by Ruyan's change and her sincerity towards him. Ruyan was originally a member of the Snake Spirit Organization and was sent to spy on Di Renjie. However, in the process of getting along with Di Renjie and Li Yuanfang, she was touched by their sincerity and decided to turn over a new leaf. Di Renjie gave Ruyan meticulous care, took her as his adopted daughter, and gave her the name Di Ruyan. These actions moved Ruyan very much. From then on, she found the feeling of home and understood why she loved and why she hated. Therefore, Di Renjie was most touched by Ruyan's change and her sincerity towards him.
Di Ruyan didn't appear in Detective Di Renjie 3 because Qian Yanqiu had originally planned to ask Jiang Xinyan to continue playing the role of Ruyan when the third film started filming. However, Jiang Xinyan had changed careers to become a producer and couldn't participate in the film. Therefore, there were no actors like Yan in the third film. In the fourth movie, Qu Zha Zha took over the role of Ruyan. The director found an explanation for Ruyan's absence in the third film: Ruyan went home to take care of Di Renjie's brother, so she was not by Di Renjie's side in the third film.
Di Renjie's Ruyan was originally a bad person. She was originally a member of the Snake Spirit Organization and was sent to Di Renjie to spy and steal information. However, as time passed, her heart was gradually moved by Di Renjie and Li Yuanfang's sincerity. She eventually turned over a new leaf and was recognized as Di Renjie's niece. She helped Di Renjie solve the case in the play and was appreciated by Wu Zetian. Therefore, Ruyan in Di Renjie could be said to have changed from a bad person to a good person.
The following conclusion: In Detective Di Renjie 2, Li Yuanfang and Ruyan were a couple. They went to the Yue clan to investigate the case and finally solved the big case. Because of their achievements, Wu Zetian officially gave Ruyan the name Di Ruyan and made her Di Gong's right-hand man. There was no clear information about Li Yuanfang's ending.
There was a complicated relationship between Li Yuanfang and Ruyan in Detective Di Renjie. In the drama, Li Yuanfang had deep feelings for Ruyan, and Ruyan also had special feelings for Li Yuanfang. However, specific information about whether they became husband and wife or married was not clear. Therefore, it was impossible to determine whether their relationship would develop further.
Di Renjie set Li Yuanfang and Ruyan up. In Detective Di Renjie, Li Yuanfang and Di Ruyan had deep feelings for each other. In the play, they hugged after they separated. In addition, Li Yuan Fang and Ru Yan did get together in the end. In Detective Di Renjie: Doubtful Shadow of the Guan River, after Di Renjie returned to Luoyang, the red cloth that was only used for marriage was hung on the door beam of Di Mansion, as was the sedan chair that Ruyan rode in. Their relationship was supported by Di Renjie.
In Detective Di Renjie II, the relationship between Li Yuanfang and Ruyan was established bit by bit. Their feelings for each other deepened over time and the accumulation of cases. In the drama, Ruyan had always been by Di Renjie's side and became his right-hand man. They had experienced many dangers and difficulties together, and Ruyan had protected and helped Di Renjie many times. Although there was no specific mention of whether they had become husband and wife, the feelings between them grew stronger and stronger, showing deep kinship and love.
Detective Di Renjie's Ruyan was played by Jiang Xinyan and Qu Zha Zha.
Di Renjie in Detective Di Renjie had indeed adopted Ruyan as his godniece. Ruyan was originally a member of the Snake Spirit Organization and was sent to spy on Di Renjie to steal information. However, her heart was gradually moved by Di Renjie and Li Yuanfang's sincerity, and she eventually turned over a new leaf and was recognized as Di Renjie's niece. Therefore, Di Renjie adopted Ruyan as his godniece.
Di Renjie knew from the beginning that Ruyan was fake. In the play, Di Renjie and Li Yuanfang both knew that Di Renjie did not have a niece at all. Di Renjie told Ruyan in the woods that he had never had a niece, so he knew she was fake. In addition, Li Yuanfang's suspicions in East Willow Town also began when the woman in black was killed. Therefore, Di Renjie and Li Yuanfang had always known Ruyan's true identity in the play.
Di Renjie suspected Ruyan's identity in Detective Di Renjie 2 in episode 11.