The GSEF with the Seoul Metropolitan Government jointly requested to open a community of practice on SSE with various local governments under the UCLG (United Cities and Local Governments). The CoP will work on mutual exchange of policy experiences on SSE among member cities. This group be chaired by the Seoul City and the GSEF secretariat will take a role of practical operation. In order to work closely with the local government members of UCLG, the GSEF participated in multiple UCLG events and forums including the 5th UCLG Congress (Oct. 2016, Bogota, Columbia), Annual Retreat in 2017 and 2018 (both in Barcelona, Spain) as well as joint session organisation at the XII Metropolis Congress (June. 2017, Montreal).