HARRY WU learned the hard way the importance of buying a return plane ticket.

When expelled, Mr Wu claims a policeman asked for US$1,000 (HK$7,738) for a non-Chinese airline ticket saying he had missed his Air China flight. But when Mr Wu arrived at Hongqiao airport, he was given a boarding pass for an Air China flight. 'Where is my US$1,000?' he demanded, but nobody responded and the jet took off.