再来看桌上的牌，明显能看到牌背面的符号，对手的牌一眼就能知道。
See table cards, apparently can see the card back symbol, the opponent will be able to know.
背面有明显原皮，作者借玉器的原有特征，巧妙地把原皮雕成如意云纹，为玉器更添色彩。
Obviously, the original author of original features, borrow jade the ably originally carved with skin, for more common jade color.
把UPC条形码标签贴于每个箱子底部或者背面，除非有明显的不同。
Unless directed differently, apply the UPC barcode label to the bottom or back of each piece.
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