Currently, to pursue the international slogan of sustainable development goals (SDGs), both industry and academic researchers have devoted themselves for creation of sustainable materials. Usually, polymeric cross-linked materials have been suffered from the lack of recyclability due to the formation of covalent bonded cross-links with permanent life time. To overcome this issue, incorporation of dynamic covalent bonds into network structures is admitted as a useful option, which provides sustainable functions, such as recyclability and healability, with cross-linked materials. Recently, a new type of dynamic covalent bonds has been developed, in which the associative bond exchange without distinct steps of bond dissociation and reassociation are operated. Such materials have been termed vitrimers and nowadays attracted great attention due to the potential of the sustainable materials. In this article, we describe the features and useful functions realized by the vitrimer concept. In the last section, one simple application way of vitrimer concept into commodity plastic is demonstrated based on our recent research, where three distinct steps of decomposition (i.e., hydrolysis), epoxy opening reaction, and trans-esterification are evolved in the present unusual cross-linking mechanism.