"So that's how it is."
Duan Mingyuan suddenly understood, and the stone hanging in his heart finally fell to the ground.
As the Prime Monarch was on the verge of collapse, he could imagine that the company must be playing their game of "proving loyalty" again. To inherit the position of Prime Monarch, one had to present achievements that could satisfy the company, such as purging the remnants of the old regime or bringing the whole academy into their pocket to offer to the company. By doing so, one could naturally gain the company's favor.
He had said that Jiuyue's box of lucky braised chicken should not be so powerful as to affect the timeline, at most it could accelerate the historical process to some extent.
Therefore, it made sense that there was a mole within the academy.
Collaborating with imperial court insiders to capture the academy and assassinate the current dean, then to take over by oneself...
All the clues pointed to Professor Snape.