Could you do me a favor

Sorry, but I do not understand your problem. Could you explain with a more realistic example?

The calligraphy here refers particular to Chinese handwriting. Say, you were a tour guide. When you saw such a thing, you would introduce it to tourists. So how would you say to introduce the content on the penmanship work? "It says"? "There are some Hanzies on it"? I want to know the expression.

rpsh Hanzies

You are not giving me any information to work with, rpsh. What are 'hanzies'? How can I judge what you want to say when you give me only 'hanzies' and 'balabalaba'?!

Generally speaking, I want to know a kind of expression. Then, here are four Hanzi(i.e. "Chinese character"):“????”. If I wrote them down on a paper and hung it on a wall, you may ask me "what do they mean?". This is a kind of expression. But, I want to know more idiomatic way to express. Could I use "what does it say" to ask a foreigner? Or could you show me more expressions?

If I still

rpshCould I use "what does it say" to ask a foreigner?

Yes, that's fine and probably the most common.

You could also say 'How do you read that?'

Got it, thank you!