Lin Ruofu knew Fan Xian.

Lin Ruofu knew the truth behind Lin Gong's murder.

Lin Ruofu knew the truth behind Lin Gong's murder. In the TV series " Celebrating Years," Lin Ruofu finally learned that Fan Xian was the murderer of Lin Gong. Although Fan Xian had always denied his crimes, through a series of probing and deductions, Lin Ruofu finally confirmed Fan Xian's actions. He told Fan Xian about the mastermind behind Lin Gong's death and tested Fan Xian's attitude toward the Lin family. Even though Fan Xian acted like he didn't know, Lin Ruofu felt that his reaction was not fake. Thus, it was certain that Lin Ruofu knew that Fan Xian was the one who had killed Lin Gong.

Lin Ruofu believed Fan Xian in " Celebrating Years." Although he had suspected Fan Xian had something to do with Lin Gong's death, after understanding Fan Xian's background and personality, Lin Ruofu chose to believe him. He knew that Fan Xian was the Qing Emperor's son and that Fan Xian's mother was actually killed by the Qing Emperor. Even though Lin Ruofu had begun to test Fan Xian, in the end, he believed that Fan Xian could protect the Lin and Fan families well and let the two families escape their predicament. He had entrusted his son, Lin Dabao, and daughter, Lin Wan 'er, to Fan Xian's care because he valued Fan Xian's personality and character. Therefore, Lin Ruofu trusted Fan Xian and chose to support him.

Although it did not explicitly mention whether Lin Ruofu knew Wu Zhu's identity, it could be inferred that he would eventually learn of Wu Zhu's existence and actions. In " Celebrating Years," Lin Ruofu's daughter, Lin Wan 'er, learned of Wu Zhu's existence and discovered that Wu Zhu was Lin Gong's murderer. Because of this, she became evil and decided to join forces with the Qing Emperor to set up a trap to kill Wu Zhu. Because Lin Ruofu and Lin Wan 'er had a father-daughter relationship, it was reasonable to assume that he would eventually learn of Wu Zhu's identity. However, the specific details and plot required further reading of related works or watching related dramas to obtain an accurate answer.

Lin Ruofu was testing Fan Xian because he suspected Fan Xian had something to do with Lin Gong's death. Lin Ruofu believed that Fan Xian had a master by his side and that Lin Gong's death was related to Fan Xian. He tried to find this expert by testing Fan Xian. However, due to a series of coincidences, he kidnapped the Crown Prince by mistake. Fan Xian and his sister Fan Ruoruo's goal was to find Taiping Courtyard. They used the excuse of going on a walk to find this place. In the end, with Wu Zhu's help, Fan Xian successfully entered Taiping Courtyard. He discovered that the person inside was the Qing Emperor. In the end, Lin Ruofu chose to believe Fan Xian because in the process of talking to Fan Xian, he had seen Fan Xian's sincerity and kindness. He felt that his previous suspicions might have been wrong. Therefore, he decided to trust Fan Xian and fight against the Qing Emperor with him.

Lin Ruofu's purpose in testing Fan Xian was to understand Fan Xian's true intentions and abilities. Fan Xian was seen as a master in " Celebrating Years," and Lin Ruofu suspected that Fan Xian had something to do with Lin Gong's death. He had arranged a series of tests, including having Fan Xian kidnapped and the Crown Prince kidnapped, as well as sending people to cut ties with Fan Xian. Lin Ruofu tried to use these tests to reveal Fan Xian's true identity and purpose. However, Fan Xian had shown his ability and loyalty in these tests and won Lin Ruofu's trust in the end. The reason Lin Ruofu chose to believe Fan Xian was because of the ability Fan Xian had shown in his probing and the support of the people around him.

Lin Ruofu was testing Fan Xian because he suspected Fan Xian had something to do with Lin Gong's death. Lin Ruofu believed that Fan Xian had a master by his side and that Lin Gong's death was related to Fan Xian. He tried to find this expert by testing Fan Xian. However, due to a series of coincidences, he kidnapped the Crown Prince by mistake. Fan Xian and his sister Fan Ruoruo…

Lin Ruofu was testing Fan Xian because he suspected Fan Xian had something to do with Lin Gong's death. Lin Ruofu believed that Fan Xian had a master by his side and that Lin Gong's death was related to Fan Xian. He tried to find this expert by testing Fan Xian. However, due to a series of coincidences, he kidnapped the Crown Prince by mistake. In the end, Lin Ruofu chose to believe Fan Xian because in the process of talking to Fan Xian, he saw Fan Xian's sincerity and kindness. He felt that his previous suspicions might have been wrong. Therefore, he decided to trust Fan Xian and fight against the Qing Emperor with him.

In the end, Prime Minister Lin knew that Fan Xian had killed Lin Gong. In the 19th episode of " Celebrating Years," Minister Lin told Fan Xian that Lin Gong was the mastermind behind the Niulan Street assassination and tested Fan Xian's attitude toward the Lin family. Fan Xian pretended not to know about this and didn't understand why Lin Gong wanted to kill him, but Minister Lin felt that Fan Xian's reaction was not fake. Thus, Prime Minister Lin finally knew that Fan Xian had killed Lin Gong.

Lin Wan 'er found out Fan Xian's true identity in the eleventh episode of the TV series " Celebrating Years."