Almost 50% users have no transactions in recent 3months,so we created many cumulative features for them,and last week,last month,last season features for active users.

，人对负面事物的记忆会更加深刻。每当看到网络上负面的评价时，朱朱总会告诉自己，这只是很小的一部分，更多人并不是这样想