Social Responsibility Report Basis of Preparation This report is prepared based on the Guideline on Fulfillment of Corporate Social Responsibility of Central Enterprises issued by the SASAC of the State Council and the Guide on Preparation of Corporate Social Responsibility Reports of Chinese Enterprises (CASS-CSR 3.0) published by the Research Center for Corporate Social Responsibility, Economics Division, Chinese Academy of Social Sciences with reference to the practices of the Company.