基于Internet的万维网是当代共享信息的原创网络（primary web） ，它是一种隐含冲突的系统，难以摆脱带宽瓶颈的困扰，不支持用户数量的自由增长。提出的第二类信息共享网络（secondary web），通过广播镜像把许多网站的完整内容收存于家庭，然后按内容的语义直接提取满足个性需求的读物。第二类网络支持用户数量自由增长，是一种低成本、无冲突共享知识的新传媒，它不仅没有带宽瓶颈，而且避免了信息垃圾。作者认为，第二类网络将同万维网互补互助，共同构成二元化信息共享架构。

World wide web (WWW) has become a primary web across the Internet, which has been widely accepted as an information-sharing platform. Due to the nature of the Internet,i.e. accessing with potential collisions, however, bandwidth bottleneck has become a serious issue of WWW, which significantly restricts the growth of web users. This paper proposes a novel information-sharing mechanism, secondary web, which automatically downloads the information that users need or have subscribed into end users’PCs via a broadcast mechanism. End users can retrieve information based on its content semanteme from their local storage instead of Internet. Therefore, due to the avoidance of the information access collision, the secondary web eliminates the bandwidth bottleneck that the primary web is facing and efficiently filters out information garbage as well. The secondary web is expected to be a new information medium, which has low cost and the ability to support the unlimited growth of users.