If you stay in the house for 15 days or more, not counting days you're really working on the properties, and for more than 10% of the total days it is in use, it becomes a mixed-use property instead of a pure investment property.

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Then you have what is known as a "mixed-use" property.

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Vantone is also investing in a mixed hotel-residential property in New York being developed by Durst, a real estate firm that owns a stake in One World Trade Center.

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The site also has inscriptions and archaeological remains that testify to 12, 000 years of human occupation and interaction with the natural environment, and for this reason was inscribed in the World Heritage List as a mixed natural and cultural property.

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"Property developers in Hong Kong have a very mixed profile, " said professor Richard Welford, deputy director of the Corporate Environmental Governance Program at Hong Kong University.

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Because it deals with so many separate issues, from farm subsidies to intellectual-property rights, the WTO attracts a very mixed bag of opponents, which is one reason that opposition to it has been hard to focus.

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They are a mixed bunch, ranging from model EU citizens such as Estonia (recently smitten by a property bust, but all set to gain permission this year to join the euro) to Romania and Bulgaria, which have become bywords in Brussels for corruption and organised crime respectively.

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