Temple of heaven panda #2 2017 GOLD & SILVER bimetallic using 35th panda coin technology. The old technology of gold and silver bimetallic unable to merge the full design into one coin. You can notice the outer layer always use to state the gold and silver weigh, purity and the Ag & Au. than the inner layer is the panda as photo. The NEW TECHNOLOGY of gold and silver bimetallic always able to merge the whole design into the gold and silver like the 35th anniversary panda coin as photo Nanjing Mint use this new technology on both observe and reverse sides of the non fiat coin like the 35th anniversary panda coin. As usual, our team love to test out new way and new things in order to breakthrough. However, it always come with risks as when new technology been used. To reduce the risks which we request mint to do a test medal by silver plachent 8 gram ag .999 before minting the gold and silver bimetallic. This allow us to examine to possibility and effect of the new technology.