In recent years, the number of sovereign wealth funds has increased rapidly. Countries that set up sovereign wealth funds include some developed countries and resource-rich countries, as well as some emerging market countries and resource-poor countries. The assets of sovereign wealth funds have expanded rapidly. By the end of 2006, the total assets managed by global sovereign wealth funds have reached about10.5 trillion to 2.5 trillion US dollars. At the same time, its asset distribution no longer focuses on G8 fixed-rate bonds, but focuses on global diversified asset portfolios including stocks and other risky assets, and even extends to foreign non-traditional investment categories such as real estate, private equity investment, commodity futures and hedge funds. Sovereign wealth funds have become increasingly active and important participants in the international financial market, and their market influence is also increasing.