Sneaking into Chemistry Class

I have no classes for today as well. Since I had nothing to do and my room will be like a sauna room in the afternoon, so I followed QiuPeng and TsuYin to class today. I missed their morning class because I went to the wrong floor although we took the same elevator. So I joined them again for lunch and the afternoon class. It's a Chemistry class. The lecturer did not know I'm not her student, so I get to sit in the classroom without being kick out. Both QiuPeng and TsuYin did not listen to the lecture but I did.

The lecturer.

TsuYin's notes.

There was this one question that the lecturer asked the class to copy and I did. The girl sitting beside me didn't get to copy and wanna borrowed from me and I lent it to her. I laughed in my heart at that moment. So so so......speechless.

Oh, I miss Chemistry~

Btw, this was the second time. The first time was Java class.