CIA's core strength lies in its unique China Real Estate Index System (CREIS), the first index system in China which got national approval by the Development Research Centre of the State Council in 1995. It is the most authorized system with databanks pool the records of investors, developers, construction firms and consultancies. The databanks are by far the most comprehensive and detailed information on China property market covering 17 major cities, containing complete histories for hundreds of listed developers, tens of thousands of buildings and industrial companies. CREIS has the fundamental sources for overseas and native investors and developers and been recognized as the indicators of China real estate market performance and guidance for investing.