The somebody else asked the monk "your name? What nationality ",answer" surname, what nationality "is really an idiotic dream or easy to produce ambiguity?

Talking in a dream at first means talking to a fool in his sleep, and the fool also believes it, so the irony of this allusion is that the person who built the monument did not understand the meaning of the text.

Monks' words can naturally be understood in many ways. In fact, as a monk, the Sangha is at home all over the world. It doesn't matter what his surname is or what his hometown is. The people who set up the monument will only understand it superficially, but can't appreciate its profound meaning. They make such jokes and only leave people laughing at it.