ERA data is based on the ERA model independently developed by CECEP (Hong Kong) Investment Co., Ltd., which is first applied to the environmental risk assessment of China's A-share listed companies, taking into account the impact of operating costs caused by environmental factors, the sensitivity of the industry to external environmental factors, and the ability of the companies to manage environmental risks. At present, ERA database covers nearly 600 listed companies with large market value and high liquidity in China's A-share market, including most of the mainstream index stocks. It covers all the CSI 300 index constituents since 2015. ERA model and data build a set of the quantitative environmental risk assessment system, with the stable and credible raw data source. The multi-level data give a high degree of flexibility, which can be widely used in stock screening, index enhancement and financial product development.