Keno game is originated from China and this game was brought to America at the end of 19th century by Chinese immigrant. At the beginning, people use 80 Chinese characters to play keno game, but in America these characters are changed to 80 Arabic numerals. The word Keno was derived from the Latin and the French word, it means hit 5 numbers from the chosen numbers will win the prize.Now Keno has become a very popular numeral game in many countries and areas. The normal official game rule is to randomly pick 1-10 numbers from 01-80. The keno system draws 20 numbers as the result at random and the computerized keno system calculates all wagers based on the numbers drawn. Usually the official Keno only gives 50% of the wager as the prize.KENO(??)??????????????????19???????????????80????????????????????80??????????KENO???????????????????5?????????????????????KENO?????????????????????????????01-80??????1-10????????????????20???????????????????????????????????????????????KENO???????50%?????????????