Christian, Aresenal is quite right. This was in 1989, just before the Tiananmen protest. The company i worked for had a consulting contract regarding tourism promotions and we were met by officials and escorted through like diplomatic staff. I paused and asked the young man for some sort of stamp as a mememto - he kindly gave me one. Just ideograms. God knows what it says. The point is he was kind to me yet refused to acknowledge the black person behind me. For decades I nevefr got a stamp returning to the US.