DEX Obtained Certificate of Credit Rating Assignment

March, 2007, Sichuan Dexin Mining Resources Co., Ltd entrusted China Chengxin Credit Management Co., Ltd to analyze and evaluate the financial and operational conditions, competitiveness, existing risks and development prospects of the company. After evaluation, DEX was awarded the Certificate of Credit Rating Assignment. The expiration date of it is March 18, 2008. According to the certificate, the credit rating of DEX is AAA .