Nowadays, schools don't endorse moral coercion.
Yannan School sets an example in this regard.
Although the anniversary was important, the school also considered Musheng's busy schedule. Plus, Sun Shutiao had asked Meng Zhao in advance and knew that Musheng was currently recording a program and assumed she wouldn't have time, so she didn't bring it up specifically. To her surprise, Musheng showed up anyway.
But her arrival was actually timely.
Sun Shutiao took Musheng by the arm, "Heartthrob, come with me first. I'm the host today and also took time out to fetch you. There'll be an event happening in the auditorium shortly, so let's head over."
Sun Shutiao was a notable figure at Yannan, aside from being the president of Musheng's fan club, she also managed many school matters and was a capable individual. Despite her busy life, she handled everything in an orderly fashion, which Musheng admired.