Late that evening, Zheng Qing didn't meet up with his companions at D&K as arranged; instead, he sent a paper crane to inform everyone that he had an urgent matter and had to analyze some talismans for Greenhill Mansion.
As for lodging, Greenhill Mansion had already arranged everything. He would be able to return once he finished his business.
About the specific location of his stay, what talismans he was analyzing, or when he would finish the tasks, Zheng Qing was deliberately vague in the message sent via the paper crane—on the contrary, he hinted throughout the note that he was not actually staying inside the mansion.
He could fully anticipate that if he honestly told the others that he would be staying at Greenhill Mansion for the next two weeks, he likely wouldn't have a moment of peace for the entirety of the term.
The next morning, before dawn had broken, Zheng Qing stealthily made his way to Flying Garden.
Flying Garden was where students attended their morning classes.