The Intergovernmental Coordination Group for the Pacific Tsunami Warning and Mitigation System (ICG/PTWS) was first established by the IOC in 1965 as a cooperation mechanism for countries in the Pacific whose coastal areas are threatened by tsunamis. Through the ICG, Member States have designed and developed the Pacific Tsunami Warning and Mitigation System and work together to improve and sustain it. At its Twenty-eighth Session (2 - 5 April 2019, Nicaragua) the ICG/PTWS decided to continue the Regional Working Group on Tsunami Warning and Mitigation System in the South China Sea Region (SCS-WG) under the chairmanship of Mr. Chan Sai-Tick (China). In this context, and following the decision to cancel the 9th session of the SCS-WG, the Chair and Secretariat proposed to host an online session on August 27-28, 2020. Main items discussed at this meeting include Seismic and Sea level core stations in the South China Sea for further enhancing ttsunami warning capabilities, South China Sea Advisory Center (SCSTAC) Decision Support System (DSS) and harmonization of tsunami bulletins issued by Tsunami Service providers (TSPs)