dumb "boston public" question

During the opening credits of “Boston Public” (a good show, if you’ve never seen it), you can see the word “Chaomung” (I believe I’m spelling that right) on a pillar in the school’s lobby. What does this mean? The word “Welcome” is on the same pillar on an adjacent side, so maybe it’s related? Pardon my ignorance, in case I’m missing something obvious…

In Vietnamese:
**chào mØng **vÎ khách quš nܧc ngoài
To extend a welcome to, to do in honour of

Tough to translate out of the dialect, but phonetically Welcome is pretty close