Suitable for ah, do catering generally very little maintenance of old customers, repeat customers are relying on the dishes to attract, in fact, there are membership, coupon activities, package activities, etc., can let the customer know in a timely manner these concessions, is to greatly increase the rate of re-acquisition, it is recommended that you must try the private domain, Guan Yu super store is specialized in doing the private domain of a system, you can learn about it.