For 2001-D the Bank of China released a Limited Issue Panda 50 Fifty Yuan Gold Coin with a special Mint Mark "D" struck in solid fine .999 Gold weighing one tenth of an ounce of solid pure Gold and has been Certified and Graded by PCGS as MS69 with special NFC Anti-Counterfeiting Technology.
The reverse design of Panda coins change each year while the obverse design features the Temple of Heaven building in Beijing.