THERE comes a time in everyone's life when they are faced with a supreme challenge, the ultimate test of whether they have the right stuff. For a Hong Kong property salesperson, that challenge is selling land for a residential development in Daya Bay. Despite the scientific reassurances, Hong Kong people still feel some . . . er . . . unease about the Daya Bay nuclear reactor, giving Samuel Wong of property company Brooke Hillier Parker the challenge of a lifetime. One commercial block is 97,637 square metres and has approval for a hefty office and hotel development. But it is a mere postage stamp compared with the 262,701 sq m residential site, which has approval for 21 high-rise blocks, each of 15 storeys, plus a load of four-storey apartment buildings. This development is to be named Greenland Villa. Remember that name. When finished, this plot alone will make the Daya Bay Planning Zone as big a development as that other DB, Discovery Bay. So, how far away from the nuclear reactor will these flats be? According to Mr Wong, quite a way - 40 kilometres to be exact. ''They are also on the other side of a mountain,'' said Mr Wong, helpfully. The shielding offered by a big piece of rock compares favourably with that other well-known local property development, Hong Kong. We suggested they change the name. But in its wisdom, the Foreign Ministry, which must approve the sale to overseas investors, called the development zone the Daya Bay Planning Zone, and Hong Kong property salespeople aren't allowed to work their usual magic. It must be Asia's biggest marketing mistake. It makes Hong Kong businesses such as the Lee Kee Boat Company and Healthy Mess restaurant look like mere amateurs. Foot in mouth TRYING hard to outdo the bad marketers from Beijing are their rivals in Italy. A group of Italian shoe companies, the Societa per la Calzatura Marchigiana, are presenting their collection here in early October. Their name is shortened to SCAM. Have TV, no SET BAD news for Thai investors. The live coverage of the Bangkok stock exchange on that country's Channel 7 TV station is ending. For years, Channel 7 has been saturating viewers with stock exchangology. While the exchange is operating, viewers get a market update every 30 minutes. And if other programmes manage to elbow their way on to the screen, a slab at the bottom is cleared to make way for a rotating stock price display and a constant update of the SET index. Channel 7, which had to pay for this stuff, has finally decided to pull the plug, much to the delight of Thai housewives. The constant update of share prices - showing bid, offer, last trade and the like - has been described as ''eyecatching''. Just the thing while watching the usual Thai daytime TV favourites of volleyball and something called Shopping Kring. Low jump GEORGE Magnus, chief international economist at SG Warburg Securities in London, has some comforting news for the Beijing Olympics bid team who have just returned home empty-handed: you have done your country a great favour. He said yesterday: ''It was probably not a bad thing that Beijing was unable to get the Olympics in currency terms. With the exception of Tokyo and Munich, being host to the Olympics has been the kiss of death for the domestic currency and I do not see abright future for the Australian dollar.'' This is strange news. One of the reasons why Australia was so keen to get the Olympics was to gain the foreign currency brought in by the spectators. Yet look at the Spanish peseta. When the Barcelona Olympics ended, there were 90 to the US dollar. Since then everyone has gone home and paid their hotel credit-card bills - yet the US dollar has soared against it. Dotsbury TYPHOON Dot blew the wrong Doonesbury into yesterday's Business Post, which ran the strip scheduled for September 30. Today we start a new saga with ''gay'' Mark, by running the strips for September 27 and 28. The strip meant for September 30 will be re-run on the correct day.