According to Sohu. The overseas sales of gold and silver coins made by pandas conform to international rules. Since 2006, two certificates of panda-made gold and silver coins have been added, which are printed with 85g panda watermark paper and colorless fluorescent anti-counterfeiting ink, and signed by the governor of China People's Bank. This certificate of panda making gold and silver coins has been used for 20 1 1 year.