交礼物时抽一个号码， 发的时候可以按号码从小到大开始去挑， 回来后打开，如果喜欢就退出game, 不喜欢的，或者更喜欢别人的礼物的人继续。从大到小， 去交换想要得礼物 （大号有priority now, so people with smaller number cann't refuse, this is the risk of the game, you may get a "better" one, or even a " worse" one). ， 同样，满意的人退出。下一轮， 从小到大， until all people leave the game. The good thing about this is it is just like a game and add a little fun to adults. Each round, people can get a new number (and follow the same order, small -> larger numbers for example) too to add a little uncertainty.