Core Viewpoint - The transformation of Dianchi Lake from one of China's most polluted lakes to a vibrant ecological and tourist destination highlights the successful integration of ecological restoration and cultural tourism, showcasing the region's unique charm and vitality [1][2][4]. Ecological Restoration - The ecological restoration efforts around Dianchi Lake have led to a significant increase in wetland areas, with a total restoration area of 62,900 acres and the establishment of 57 wetlands, marking a historic shift from "people entering the lake" to "the lake retreating from people" [2][3]. - The water quality of Dianchi Lake has improved dramatically, achieving a transition from "poor V class" to "IV class" since 2016, and maintaining this quality for seven consecutive years [2][3]. - The number of rivers entering the lake with good water quality has increased from 17.2% to 81.8% over the past decade, with the number of good-quality rivers rising from 5 to 27 [3]. Biodiversity and Community Engagement - Biodiversity in the lake has seen a notable increase, with plant species rising from 232 to 303, bird species from 89 to 175, and fish species from 0 to 26, indicating a successful recovery of native species [3]. - The development of greenways and recreational areas has enhanced community engagement, allowing residents and tourists to enjoy the natural beauty and participate in activities like birdwatching and cycling [3][4]. Rural Transformation - The opening of the "Dianchi Youli" homestay in Niulian Village has attracted significant tourist interest, with over 85% of guests coming from outside the province, reflecting the successful integration of tourism and local culture [4][5]. - The number of visitors to Niulian Village increased by 132.11% year-on-year, with total tourism revenue exceeding 9 million yuan, showcasing the economic benefits of rural transformation [4][5]. Cultural and Tourism Development - The construction of the Dianchi Greenway has created a scenic and cultural link between natural landscapes and local communities, enhancing the overall tourist experience [7][8]. - Events like the 2025 Dianchi International Coffee Culture Carnival have attracted over 2.8 million visitors, promoting cultural and ecological awareness while boosting local tourism [8]. - The integration of cultural elements into tourism has led to the emergence of new business models, enhancing the richness of the tourism product offerings around Dianchi Lake [8].