Over the past decade, the Greater Mekong Subregion (GMS) Regional Power Trade Coordination Committee (RPTCC) has made significant progress in deepening cooperation among its members to scale up power trade. The RPTCC has taken steps to harmonize power sector regulations, technical performance standards, and grid codes. It has been a privilege for the Asian Development Bank (ADB) to support this work to help GMS members reap the benefits from more optimized use of diverse energy resources across the region.