Excuse me! My friend is in hospital! I only know his last name. Can I go to the hospital to find out which room he lives in? Will the hospital tell you?

Yes, you must first understand his illness, estimate which ward he lives in (internal medicine, surgery, gynecology, pediatrics), and then go to the nurse's duty room to tell your friend the date of hospitalization and the main symptoms. If you don't know all this, and the hospital is large, you will have to look for it one by one.