Shen XIII comprehended Zhao Shengnan's meaning. But he also understood that Dong Qian dared to do so because he had a large group of Ministers who were responsible for his orders.
And he's using hidden rules, not something that can be grasped on the surface.
That is to say, he will not explicitly ask Zhao Shengnan to make an imaginary number. Instead, Zhao Shengnan, who was stuck with the project funds and refused to approve them, took the initiative to do so. In that case, even if Shen Shi-san tried to get rid of him, he could not find any reason, or if Shen Shi-san wanted to get rid of...