中文摘要：

闭环供应链包括正向供应链和逆向供应链两个环节，闭环供应链通过两个环节的相互衔接，可实现物料的多次循环，极大地减少社会生产对原材料、能源的需求，减少废弃物的排放，有利于环境保护。闭环供应链因其巨大的正外部性，受到了国内外的广泛关注。其中，物料恒定辨识是闭环供应链信息共享的前提。鉴于此，文章建立了包括物料编码、物料信息平台、信息读写三个组成部分的闭环供应链物料恒定辨识体系。该信息平台的建立和运行必须解决两个关键性问题：一是闭环供应链甚至跨闭环供应链的产品，物料编码标准体系构建问题，二是闭环供应链间信任机制与数据准确性保障机制建立问题。

英文摘要：

Forward supply chain and reverse supply chain are included in the closed-loop supply chain： with the linkage of forward and reverse supply chain, the multi-times reuse of material can be realized, which will in turn reduce the demand for raw material and energy in social production and reduce the emission of wastes which will be beneficial for environmental protection. Because of the significant positive externality, the closed-loop supply chain attracts the extensive attention both at home and abroad. Material constant identification is the premise of closed-loop supply chain information sharing. For that reason, a material constant identification system of closed-loop supply chain including material code, material information platform and information output/input is proposed. There are two key issues have to be solved before we build and apply this information platform. The first is how to build the standard system for product/material coding for the closed-loop or cross- closed-loop supply chain; the second is how to develop the trust mechanism among the closed-loop supply chains and the guaranteeing mechanism of data accuracy.