The text means "Lao wai. 老外", which is the not so nice but oh so common way of referring to foreigners in China. It more or less can also mean alien, and if you look for information on applying for a Chinese visa, the official page refers to foreigners as aliens as well. This is probably the first word you learn upon your arrival in china...and it follows you EVERYWHERE you go as you can see. Some of us can choose to play along. : )
