Group 1 - Urban areas are crucial for modernization and the well-being of over 900 million urban residents, emphasizing the importance of ecological environment [1] - The Haizhu National Wetland Park in Guangzhou, known as the "green heart" of the city, spans over 16,000 acres and is a rare large wetland park located in the center of a major city [3] - The transformation of Haizhu Wetland from a polluted area to a thriving ecological park involved significant investment and legislative measures to protect the land for ecological purposes [5][7] Group 2 - The ecological restoration efforts in Guangzhou have led to a significant increase in biodiversity, with plant species rising from 294 to 835, insect species from 42 to 903, and bird species from 72 to 202 over a decade [9] - The construction of pocket parks in Ma'anshan City has improved urban green space, with a green space rate of 44.52% and an increase in per capita park area by 4.06 square meters compared to 2022 [14] - The successful management of the Naka River in Nanning, which transformed from a polluted waterway to a clean ecosystem, serves as a model for other cities in addressing urban water pollution [22]