Group 1 - The transformation of the Yong River in Nanning is attributed to the city's commitment to the "People's City, Built by the People" concept, focusing on integrated water management and green development [1][2] - Nanning has implemented six local regulations and established a comprehensive four-level river and lake management system, investing over 40 billion yuan in watershed governance [1][2] - The city has achieved a centralized sewage collection rate of 80.11%, with 38 sections of black and odorous water bodies eliminated, and maintains a 100% compliance rate for drinking water sources [2] Group 2 - Nanning's flood prevention standards have been upgraded from a 50-year to a 200-year flood event, supported by three water conservancy hubs [2] - The city has integrated 785.33 hectares of new green space and 163 kilometers of riverside greenways, enhancing recreational areas and promoting a vibrant urban environment [2] - The Yong River has become a new landmark for cultural tourism, hosting events like the China-ASEAN International Kayak Open and attracting 4 million ASEAN tourists [2][3]