Sangong is a decentralized board game developed by the public chain of EOS. The rules are automatically executed by intelligent contracts. The room has 4 idle home, a banker, the player can choose one or many idle home undertake betting, after dealing a card, the card of 4 player and banker undertake comparative, if the card of player bet idle is bigger than banker, will win the 2 times earnings of corresponding bet amount. One minute lottery game, a day 1440 issue, one minute after the end of the countdown (just every full minute moment), take the EOS main network generated "hash value" for licensing, from the beginning of the idle one card, each three CARDS. Hash value is distributed in all over the world in 21 super node block in turn generate packaging, it is based on a series of very complicated encryption algorithm generated, it is such a future, uncontrolled random results, to ensure the EOS three-fair absolutely fair and open game, win or lose result of every game, players can easily verify independently. All data will also be tampered with on the chain record shall prevail.