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Leping is a county-level city in northeastern Jiangxi Province, China, situated within the Poyang Lake Plain region at coordinates 28.9780°N, 117.1520°E. With a population of 753,787, it functions as a mid-sized urban center in East Asia, characterized by a blend of urban development and surrounding agricultural landscapes. The city lies approximately 120 kilometers northeast of Nanchang, Jiangxi's capital, positioning it within the Yangtze River Delta's broader economic sphere while maintaining distinct local characteristics. Terrain here is predominantly flat to gently rolling, with an average elevation around 40-60 meters above sea level, typical of the alluvial plains formed by the Yangtze River system. Leping's proximity to Poyang Lake—China's largest freshwater lake located about 80 kilometers to the northwest—creates a microclimate influenced by this substantial water body, though the distance moderates direct lake effects. The region forms part of Jiangxi's agricultural heartland, with rice paddies and vegetable fields surrounding the urban core, creating an urban-rural gradient where pollution sources transition from concentrated urban emissions to dispersed agricultural burning. This geographic setting affects air quality through several mechanisms: the flat terrain allows pollutants to disperse relatively evenly but can also facilitate temperature inversions during calm conditions; agricultural activities contribute particulate matter during harvest seasons; and the city's position in eastern China places it downwind of industrial regions during certain meteorological patterns, though it lacks major heavy industry locally. The Le'an River flows through the area, providing some atmospheric moisture but insufficient to significantly scrub pollutants.

Leping experiences distinct seasonal air quality patterns influenced by East Asian monsoons and local meteorological conditions. During spring (March-May), increasing temperatures and occasional rainfall help disperse pollutants, though agricultural burning after winter harvests can cause temporary particulate spikes in April. The summer monsoon (June-August) brings southeasterly winds from the Pacific, generally providing the cleanest air of the year as frequent precipitation washes pollutants from the atmosphere; July and August typically offer the best conditions for outdoor activities. Autumn (September-November) sees deteriorating air quality as monsoon winds retreat and temperature inversions become more frequent; October and November often experience the year's worst pollution due to stagnant atmospheric conditions combined with agricultural burning and increased residential heating. Winter (December-February) brings cold, dry conditions from the northwest, sometimes carrying pollutants from northern industrial regions, while temperature inversions trap local emissions from heating sources; January tends to be particularly problematic. Sensitive groups—including those with respiratory conditions, children, and the elderly—should limit prolonged outdoor exposure during late autumn and winter, especially on calm, foggy mornings when inversions are strongest. Morning exercise is best avoided during pollution episodes; instead, plan activities for afternoons when atmospheric mixing improves. During cleaner summer months, most residents can enjoy outdoor activities freely, though those with severe sensitivities should still monitor daily conditions.