Fan Xian knew about the Niulan Street assassination.

In " Celebrating Years," Fan Xian was assassinated on Niulan Street. There were three people behind the assassination of Fan Xian on Niulan Street. They were Lin Gong, the Second Prince, and the Eldest Princess. Lin Gong was Lin Wan 'er's brother. He had arranged for Cheng Jushu to assassinate Fan Xian on Niulan Street. His goal was to stop Fan Xian from robbing the Eldest Princess' palace treasury and marrying Lin Wan 'er. The Second Prince assassinated Fan Xian because he did not want Fan Xian to take control of the palace treasury. The Eldest Princess had two reasons. One was that she supported the Second Prince and did not want Fan Xian to interfere with matters of the throne. The second was that she did not want Fan Xian to take control of the palace treasury. In addition, there was also a strategist, Wu Bo 'an, who was related to Prime Minister Lin Ruofu. He also participated in the behind-the-scenes planning. Thus, the masterminds behind the assassination of Fan Xian on Niulan Street were Lin Gong and Wu Bo 'an.

The masterminds behind the killing of Fan Xian at Niulan Street were Lin Gong, the Second Prince, and the Eldest Princess. Lin Gong was Lin Wan 'er's brother and also the Crown Prince and Eldest Princess's man. He had arranged for Cheng Jushu to assassinate Fan Xian on Niulan Street. The reason the Second Prince and Eldest Princess were involved was because they didn't want Fan Xian to manage the palace treasury and didn't want Fan Xian to marry Lin Wan 'er.

The masterminds behind Fan Xian's assassination on Niulan Street were Lin Gong, the Second Prince, and the Eldest Princess. Lin Gong obtained the token to control Cheng Jushu and smuggled him into the city. The Second Prince had assassinated Fan Xian because he did not want him to take control of the palace treasury. The Eldest Princess had done so to assist the Second Prince in ascending the throne. She needed to eliminate all threats.

The masterminds behind Fan Xian's Niulan Street assassination were Lin Gong, the Second Prince, and the Eldest Princess.

The masterminds behind the assassination of Fan Xian on Niulan Street were Lin Gong, the Second Prince, and the Eldest Princess.

The masterminds behind the assassination of Fan Xian on Niulan Street were Lin Gong, the Second Prince, and the Eldest Princess.

Fan Xian's assassination on Niulan Street was jointly arranged by Lin Gong, the Second Prince, and the Eldest Princess.

The masterminds behind Fan Xian's Niulan Street assassination were Lin Gong, the Second Prince, and the Eldest Princess.

The real murderer of the Niulan Street assassination was Lin Gong. Lin Gong was a member of the Prince's faction and was thought to be the mastermind behind Fan Xian's assassination at Niulan Street. His motive was not to let Fan Xian control the palace treasury and not to let Lin Wan 'er marry Fan Xian. In addition, there were some signs that Lin Gong might have a larger force behind him. Therefore, according to the information provided, Lin Gong was the real murderer behind the Niulan Street assassination.

In " Celebrating Years," the masterminds behind the assassination of Fan Xian on Niulan Street were Lin Gong, the Second Prince, and the Eldest Princess. Lin Gong was the one who had obtained the token to control Cheng Jushu and had smuggled him into the city. The Second Prince did not want Fan Xian to take charge of the palace treasury, so he wanted to assassinate him. The Eldest Princess actually supported the Second Prince, so she also participated in the plan to assassinate Fan Xian. This assassination was planned by many people.