So it seems Uncle Mei knew about his illness long ago, and that's why he had everything prepared ahead of time, even taking Mei Zhehao's mother on a trip as a compensation for the half a lifetime she spent with him without official recognition.
When Miss Qinghe's leave request landed on the teacher's desk once more, the old man nearly had a fit of epilepsy at the corners of his mouth. How had he been fooled by that girl into giving her so many leave requests, oh, the regret. However, when Qinghe's grades appeared on his desk, all his regrets vanished into thin air, replaced with such excitement that he almost forgot Qinghe was a problem student; he was eager to let everyone know Qinghe was a student in his class, but that's a story for later.
In the end, Qinghe took one last look at the teams of searchers, instructed them to report their progress to her daily, and then flew off to Hong Kong, reassured.
