Yes, Northern Qi knew that Friar He was the head of the spies. In " Joy of Life," Fan Xian used money to open a path for information through his cooperation with the Northern Qi empress dowager. After Fan Xian rescued Yan Bingyun, he decided to leave Guo Baokun behind as a shield, while Friar He became the head of Northern Qi's spies. However, the Northern Qi Emperor had already guessed Friar He's identity. As for the fate of Friar He, they would have to wait for the second season to update.

The Northern Qi Emperor knew that Friar He was the head of the spies. In Joy of Life, Zhan Doudou learned that Friar He had gone to see Fan Xian and discovered that he was the head of Northern Qi's spies. In addition, Fan Xian had also reached an agreement with the Northern Qi empress dowager. On the surface, he was using money to open the way, but in secret, he was gathering information. Although the play did not reveal the reason why Friar He was controlled by Chen Pingping, from his attitude toward Fan Xian and his own statements, it could be inferred that Friar He was not a Qing person, nor was he a Qing spy. However, Chen Pingping grasped some kind of secret of Friar He that was disadvantageous to him and used this secret to control him. Thus, according to the information provided, Northern Qi knew that Friar He was the head of the spies.
The leader of the Northern Qi spies was Yan Bingyun. He was the head of the Qing spies lurking in Northern Qi. Yan Bingyun's true identity was the grandson of Xiao En, the spy leader of Northern Qi. His mother was a prostitute. He was doing very well in Northern Qi, becoming the head of Northern Qi spies and taking charge of the entire Northern Qi spy network.
The person who had hooked up with the Northern Qi spy was Wu Bo 'an. In the play, Si Lili and Wu Bo 'an conspired to assassinate Fan Xian and used the Second Prince's banquet to carry out the plan. In the prison, Fan Xian had used torture to force a confession and learned the identity of the mastermind from Si Lili. Therefore, Wu Bo 'an was confirmed to be the mastermind behind Si Lili.
The leader of the Northern Qi spies was Yan Bingyun. He was the chief spy of the Qing Kingdom in Northern Qi, played by the actor Xiao Zhan. Yan Bingyun's true identity was the grandson of Xiao En, the spy leader of Northern Qi. His mother was a prostitute. He was doing very well in Northern Qi, becoming the head of Northern Qi spies and taking charge of the entire Northern Qi spy network.
The Northern Qi spy was Si Lili. Si Lili was a spy sent by Northern Qi to the Qing Kingdom. She was sent to the Qing Kingdom to disguise herself as a prostitute and become a spy for Northern Qi to gather intelligence. She had conspired with Wu Bo 'an to assassinate Fan Xian and used the Second Prince's banquet to carry out the plan. In the prison, Fan Xian had used torture to force a confession and learned the identity of the mastermind from Si Lili. Thus, according to the information provided, Si Lili was the mastermind behind the Northern Qi spies.
The person who had hooked up with the Northern Qi spy was Wu Bo 'an.
Joy of Life's Northern Qi spy was Yan Bingyun. He was a spy sent by the Qing Kingdom to Northern Qi. Because Fan Xian had been assassinated in Danzhou, Yan Bingyun had been implicated and sent to Northern Qi. He had made great contributions in Northern Qi, but he was later betrayed and captured by the Eldest Princess, suffering greatly. After returning to the country, he still could not escape the fate of continuing to be a spy. On one hand, he was responsible for watching Fan Xian. On the other hand, he was responsible for bringing Chen Pingping and Fan Xian back to the Qing Emperor's side.
Joy of Life's Northern Qi spy was Yan Bingyun.
Joy of Life's Northern Qi spy was Yan Bingyun.
The person who had hooked up with the Northern Qi spy was Wu Bo 'an. In the play, Si Lili and Wu Bo 'an conspired to assassinate Fan Xian and used the Second Prince's banquet to carry out the plan. In the prison, Fan Xian had used torture to force a confession and learned the identity of the mastermind from Si Lili. Therefore, Wu Bo 'an was confirmed to be the mastermind behind Si Lili.