2021 Silver Panda Coins 2021 Chinese Silver Panda Unboxing at Bullion Exchanges The item 2019 150g 150 gram Chinese China Silver Panda 50 Yuan 999 Proof with Box COA Nice is in sale since Friday, February 28, 2020. COA numbers will vary as multiple coins are available. Posted on August 18, 2019 by admin in 150g.