Beijing life express delivery is a successful case . its mail channel is the high - grade community in beijing . the beijing tianxing - jian advertisement cultural corporation chose mail dm media on the tourist line 传统媒体广告投放弱点就在于渠道方式中，没法有针对性的选择目标人群， dm广告是免费赠送，是强行给读者的，可以准确地选择读者，规范渠道。
