We aim to construct a testbed for a universal quantum communication network, which is the key technology of a distributed large-scale quantum computer (QC). We will integrate hardware & software to demonstrate the principles & techniques of communication architecture & protocols, with the ultimate goal of practical implementation. The outcomes of this project will not only contribute to the distributed large-scale QCs but also lead to the quantum internet. By achieving a symbiotic relationship between the two, we will contribute to the realization of a world where quantum information can be freely available. We will proceed with a two-pronged strategy, which involves implementing & demonstrating the principles & technologies of the entire system on a small scale using the testbed, and validating scalability using simulations.