MR Long Shen had never seen so much cash in his life - US$7,000 (HK$54,103) and 6,000 yuan (HK$8,082) - and then he left it in a Hongkong taxi. Mr Eddie Yeung Mo-yat had never seen so much either, but without a second thought he handed it in to the nearest police station. Mr Shen said yesterday: ''It's incredible. I'm from New York where people will break your window for a quarter. ''I thought I'd lost everything but within 20 minutes I had it all back.'' Mr Shen, a Chinese citizen now living in America, was visiting Hongkong on his way to China on a business trip. But when he got out of a taxi at a friend's apartment in Western late on Thursday night and picked up his suitcases he left his document wallet with his passport, US residency permit and cash. ''I realised straight away, but the taxi was gone. I reported it to the police and tried to ring the taxi companies, but there are so many,'' he said. The police warned Mr Shen that he might have seen the last of his case and the cash, which belonged to his company and was to finance import-export deals in China. Luckily for him the next person in the taxi was Mr Yeung, a 24-year-old promotion officer of a China-backed bank. ''It's hard to describe how I felt, maybe I put myself in the position of the person who had lost the case,'' he said yesterday while being treated to a cup of tea at a hotel by the grateful Mr Shen. ''It is a lot of money, but not enough to change my life,'' Mr Yeung said. Even the police had trouble believing the honesty of Mr Yeung, who works in the marketing side of banking and does not handle cash. When he handed the case over, the policeman said ''as a human being I think giving the money back is crazy, but as an officer I appreciate the decision''. Mr Shen was last night trying to decide how to reward Mr Yeung. ''He should win an award for honesty. I could give him half the money, but he could have taken all of it, so I'd like to think of another way,'' Mr Shen said. Thanks may come in the way of a business deal for Hongkong from Mr Shen's firm, US China Link, which is considering ventures in the territory. ''We are friends now, and if we can help each other that will be good,'' he said.