A buying frenzy by Chinese investors is expected to keep the property market in Australia's major cities booming for at least the next two years. Thousands of Chinese buyers jostled for attention at a property expo in Sydney last week where 50 companies were offering units in yet-to-be-built apartment developments. According to sector analysts, 5,800 apartments are under construction in Sydney, with another 11,500 due to be completed within the next three years, the biggest building boom in the city's history. Analysts also say Chinese investors are driving the boom, rather than people who intend to occupy the properties.