On September 8, the ECCK Green Working Group (GWG) hosted a seminar on “Sustainable Cities with Smart Buildings” at its office in Seoul Square. The seminar consisted of two presentations led by the day’s key-note speakers, Mr Christoph Aebischer (Vice President, Head of Division at Simens Korea) and Mr David Hahm (Program Director at World Smart Sustainable Cities Organization (WeGO)). Mr Aebischer provided his valuable insights on how Siemens technologies can be cooperated in creating a smart and sustainable city, and followed by was the second presentation from Mr Hahm on envisioning a smart sustainable city for all that leverages digital technology and connectivity to become smart and sustainable city. Subsequently, Mr Chungha Cha, Co-Chairman of the ECCK GWG and CEO of re!magining Cities Foundation, came as a moderator to lead the open discussion for the participants to openly share their thoughts and ideas on the issue. The ECCK would like to thank all the attendees for their interest and support, and we look forward to seeing you all again in the upcoming GWG seminar in December.