CBL is involved with several countries in various international activities such as receiving overseas delegations and trainees, and information exchange via overseas building and housing-related organizations. CBL is a member of the World Federation of Technical Assessment Organizations (WFTAO) and exchanges information on technical assessment of innovation in the construction field. CBL also regularly exchanges information with the China Architecture Design and Research Group (CAG). TBTL in CBL contributes to international collaboration by its affiliation to CIB (International Council for Research and Innovation in Building and Construction) and to the RILEM (International Union of Laboratories and Experts in Construction Materials, Systems and Structures). TBTL also contributes to ISO standardization by dispatching members to relevant technical committees.