CRM系统1、从新客户到老客户接入到老客户维护和营销的每一个环节。2、与销售、营销、推广、策划、人事等多部门业务对接。3、优化各业务环节，减少各环节客户流失-CRM system 1, new customers to existing customers and existing customers to maintain and access to every aspect of marketing. 2, with sales, marketing, promotion, planning