The Chinese stock market started in 1986. China stock market becomes the third largest stock market in the world in just 20 years. Recently, Chinese companies seeking overseas listing, the purpose is to through the overseas listed to expand the financing channels, increase the stock liquidity, and better the corporate governance structure. The study through comparing corporate governance of Hong Kong and the mainland listed real estate companies, the conclusion is corporate governance of real estate companies that are listed on the Hong Kong market is not notably superior to that of their domestically-listed counterparts. In order to understand whether improving the corporate governance by overseas listing can enhance the corporate performance of companies. This thesis conducts linear regression analysis, technically to analyze the relationship between corporate governance and corporate performance. The conclusion is mainland real estate enterprises listed in Hong Kong can improve their company performance by improving corporate governance, while the effect for mainland real estate enterprises to do so is not obvious. The result indicates that with the combined effect of external and internal governance environments, enterprises are able to achieve the purpose of enhancing corporate performance by improving corporate governance.