NGC PF70 UC China 2002 Colored 4 Pieces of 1oz Silver Coins Set – Peking Opera (4th Issue). Purity: 99.9% Silver. Weight: 4 x 1 Oz. Face Value: 4 x 10 Chinese Yuan. Welcome to Giant Panda Coins! Our antique store has over. 12 years old history. Flagship store locates at Yun-Zhou commercial building, Shanghai, China. Branch store locates at Ju-Qi-Cheng commercial building, Shanghai, China. We speak English and some German.