I'm a teacher? What??

I now have confirmation that what I am teaching does not matter at all. Why? Yesterday while I was giving a final in my class, I had a student show up in the middle of it that I had never seen before. She asked me to give her a grade for freshman English. What she was telling me wasn’t making much sense so I told her to come back after class. She was a sophomore who had changed her major so she hadn’t taken freshman English because she was an education major last year. So she wanted me to give her a final and then a grade even though she’s not on my roster or ever been in my class. I talked to one of my bosses and she said I should do it. Hmmm…okay. So, there’s no need to go to class or participate or do anything other than show up for the day of finals and ask a random teacher for a grade??? How does this make sense? Oh that’s right. I’m in China. And yes, I’m giving her a grade today.