The title is wrong. It's Korean characters. And Koreans, especially the North Koreans are very good at doing it. However, this looks like South Korean students as they display English and Chinese characters, which are usually banned in the north.

This is not "ice tea". It's Malaysian Milk Tea. Here is the Wikipedia entry: https://en.wikipedia.org/wiki/Teh_tarik

Trump's gonna love this.

It only applies to some certain types of elevator. Mitsubishi is one of them.