I don't recall the monk-boy. The levitating monk who had visions was called Blessed Lightning in the English version. The Chinese boy whose rescue was the object of the story was called Chang.
I'll have to go look it up. Can't place who you're talking about.
Edit: Ah, the boy who Snowy attacks, to gain the monks' attention so they'll go and rescue Haddock and Tintin.
He's called Lobsang in the English edition I have (1979, don't know if they're still using the same translation).