There are three types of welfare lottery in China: open lottery, lottery digital lottery and Keno lottery, and * * * includes five major games (scratch, 3D, two-color ball, 7 Le Cai and Happy 8). Commonly known as "Welfare Lottery", it is the abbreviation of China Welfare Lottery. On July 27th, Kloc-0/987, it was distributed and sold nationwide (named "China Social Welfare Award-winning Donation Voucher") to "unite people from all walks of life who are enthusiastic about social welfare, carry forward the socialist humanitarian spirit and raise social welfare funds. Set up welfare undertakings for the disabled, the elderly and orphans to help those in need ",that is, the purpose of" helping the elderly and the disabled, helping the poor and saving the orphans ". Later, the China Welfare Lottery Distribution Center was established as a specialized issuing institution. Traditional lottery traditional lottery, also known as passive lottery, is announced in advance by the issuing department in fixed grouping, winning form, prize level and winning amount or in kind. After the lottery ticket is sold for a period of time, the lottery ticket is held in a centralized and open way, and the buyer "sits in the right place" to win the lottery ticket. This lottery ticket is printed with sequence numbers in advance, generally 5-7 digits, and several groups of winning numbers are selected by drawing lots according to the rules on the specified lottery date, which are respectively used as winning grades. If the number of the purchased lottery ticket is consistent with the winning number, the prize will be won; The middle and low prizes are generally determined according to the digits of the mantissa of the winning number.