抽奖系统。营销活动现场，观众填写个人资料将表格交给录入人员产生编号进行抽奖，奖项分两等，现金奖3个，鼓励奖5个。画面由带TV-OUT的显卡发送到两台电视机和一台背头电视上。-lottery system. Marketing the scene, the audience will fill in personal data entry forms to produce numbers for a lucky draw prizes two, three cash prizes, the pri