The Global Reporting Initiative (GRI) has published its latest sustainability reporting guidelines-G4 in 2013 for diverse organizations to disclose their sustainability issues among economic, environmental and social aspects. In order to make the guidelines more applicable in Taiwan, TWSE assigned a representative to act as a peer reviewer of the traditional Chinese translation of G4. The final version was officially published on May 15,2014. TWSE highly recommends listed companies to maintain their sustainability reports with G4 guidelines, aiming to address the awareness of sustainability issues among companies and stakeholders to further improve the comparability of the reports.