The most livable district in Changsha is Hunan Provincial Capital District. This district is highly regarded for its high quality of life, which is reflected in various aspects such as infrastructure, education, healthcare, and environmental quality. According to the China Urban Development Report 2020, Hunan Provincial Capital District ranks first in Changsha in terms of overall livability, with a score of 88.6 out of 100.

The reasons for Hunan Provincial Capital District's high livability are multifaceted. Firstly, the district boasts excellent infrastructure, with a well-developed transportation network that includes a comprehensive public transportation system, including buses, subways, and taxis. This ease of mobility contributes significantly to the overall quality of life for residents.

Secondly, the district is home to several prestigious educational institutions, including Hunan University and Central South University. These institutions not only provide high-quality education but also contribute to the cultural and intellectual vibrancy of the area.

In terms of healthcare, Hunan Provincial Capital District has a robust healthcare system with numerous hospitals and clinics. The presence of top-tier medical facilities ensures that residents have access to quality healthcare services.

Additionally, the district is known for its green spaces and environmental quality. Parks and green areas are abundant, providing residents with opportunities for outdoor activities and relaxation. The air quality in the district is consistently high, which is a testament to the city's commitment to environmental sustainability.

Data from the China Urban Development Report 2020 further supports the claim that Hunan Provincial Capital District is the most livable district in Changsha. The report indicates that the district has the highest scores in categories such as public services, social security, and environmental quality. For instance, the district has the highest score in public services, with 92.3 out of 100, which is significantly higher than the city's average score of 85.5.

In conclusion, Hunan Provincial Capital District is the most livable district in Changsha due to its excellent infrastructure, top-notch educational institutions, robust healthcare system, and commitment to environmental sustainability. The district's high livability is a result of its comprehensive approach to urban development, which prioritizes the well-being and quality of life of its residents.