Group 1 - The Guangdong-Hong Kong-Macao Greater Bay Area has initiated the compilation of a quality drinking water standard system to ensure drinking water safety [1][2] - The meeting was guided by the Pearl River Water Resources Commission, Hong Kong Water Supplies Department, and Macao Marine and Water Bureau, with Guangdong Yuhai Water Co., Ltd. leading the organization [1] - Participants discussed the differences in existing drinking water quality standards among the mainland, Hong Kong, and Macao, and provided constructive suggestions on the compilation of the standards [1][2] Group 2 - The establishment of a unified drinking water quality standard is seen as a practical response to national strategies and public needs, and is crucial for water safety in the Greater Bay Area [2] - The successful meeting marks a significant step in the standardization work, following the water efficiency labeling standard for water-using appliances in the Greater Bay Area [2] - The initiative aims to serve industrial development, market regulation, technological upgrades, and the conservation of water resources, potentially providing a model for the development of a water-saving industry in the Greater Bay Area [2]