**Why Day 7 = high-intent, not just high-activity** - Requesting a callback is an explicit buying signal: the lead wants human contact, which usually precedes scope and pricing discussions. - 中文：主动预约回电是明确的购买信号，通常意味着客户已准备进入需求和报价沟通阶段。 **Why AI still keeps them in C pool** - Day 7 score ≈ 22 vs C→B threshold 60. One strong signal ≠ enough cumulative evidence; AI weighs historical depth + frequency, not a single act. - 中文：第7天分数约22，远低于C→B门槛60；单次高价值行为不足以升级，AI看的是累计证据和行为深度。 **Actions the system should trigger now (not upgrade)** - Auto-create a sales follow-up task for the success team within 24h; send a lightweight discovery checklist, not a full proposal yet. - 中文：24小时内自动生成销售跟进任务；先发轻量需求清单，不急于推完整方案。 **What would justify C→B upgrade** - Add proposal request, pricing page views, multi-stakeholder engagement, or repeat callback/demo request to push score toward 60. - 中文：若再出现索取方案、查看报价页、多方参与或重复预约，评分才有机会逼近60并触发升级。 **Link to the 100-unit distribution inquiry** - Keep it in C nurture with timely human contact; once requirements become clear (locations, learner volume), escalate to B and issue proposal to convert into a 100-unit distribution deal. - 中文：先以C池持续培育并由销售及时跟进；需求明确后升级B池并输出方案，推动转化为100套分销询盘。