Social media sites and online realtors are playing a critical role in facilitating the overseas property investments of Chinese's burgeoning middle class.

Foreign property investment by Chinese nationals has surged in just the past two years, with data from real estate consultancy Savills indicating that they accounted for US$13.5 billion in overseas purchases last year. That marked an increase of over 100 per cent compared to the figure of US$6.3 billion logged the previous year. US real…