And after returning from the U.S., he earned a doctorate from Hong Kong Polytechnic University in 2011.

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China already imposes taxes on property as many as a dozen, according to Bo-sin Tang of Hong Kong Polytechnic University.

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The Chinese are more likely to be this second type of buyer, according to Lingjing Zhan of Hong Kong Polytechnic University and Yanqun He of Fudan University.

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"The government will try not to do something they don't think they can handle right now, " said Eddie Hui, Professor at the Department of Building and Real Estate of the Hong Kong Polytechnic University.

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Also, scientists at the Hong Kong Polytechnic University have been able to build a nano-thin layer of particles of titanium dioxide, a substance that reacts with sunlight to break down dirt and other organic material.

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Materials scientist Dr. Walid A. Daoud and textile scientist Dr. John Xin, both from The Hong Kong Polytechnic University (PolyU), used nanotechnology -- whereby the tiniest particles available to man are used -- to come up with the concept.

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Researchers from Eindhoven University of Technology and Hong Kong Polytechnic have leveraged those temperature swings to help solve the arid region hydration conundrum with a cotton material that absorbs water straight from the surrounding air.

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