(Chinanet four-phase expansion standard book. 1.1 This document is used for this document 1.1.1 This document is the engineering plan, main technical request, engineering request and supply request for the fourth-phase expansion project of the Computer Internet for the Administration of Posts and Telecommunications (Party A), for the manufacturer (Party B) to prepare proposals and quotations use. 1.1.2 In the proposal, Party B shall explain and answer the technical and engineering requests mentioned in this document item by item, and can also make suggestions based on the detailed status of the technical functions of its own products, and attach detailed information and explanations.)