1, Ertong is a card in mahjong, also called Erbing. It's a pack card in mahjong. There are nine kinds of cards from one barrel to nine barrels, each with four cards, a total of 36 cards.
2. A complete set of mahjong tiles is 156. At present, the simplified version of mahjong is popular, excluding jokers and whiteboard, totaling 144. Mahjong generally has ten thousand characters, packages and bundles.