用户提前团购，然后打印用于兑换该笔交易的优惠券。

Users buy deals in advance and then print out a coupon that's used to redeem the deal.

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免费房兑换使用必须需提前一天向酒店或订房中心预定。

Please make a reservation one day in advance you use the coupon.

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远期兑换：所兑换的产品在一个自然月内有效，在一个自然月内您需要提前预订使用产品。

Forward Redemption: the redeemed items will be valid within a month, and you need to reserve the items in advance within the period.

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远期兑换：所兑换的产品在一个自然月内有效，在一个自然月内您需要提前预订使用产品。

Forward Redemption: the redeemed items will be valid within a month, and you need to reserve the items in advance within the period.

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