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Jinjicun, nestled within Guangdong Province, China, occupies a geographically significant position within the Pearl River Delta, a region renowned for its rapid urbanization and industrial development. Located at approximately 22.1696° N, 112.4812° E, the town sits on relatively flat terrain, characteristic of the delta's alluvial plain. Its elevation is low, generally below 20 meters, contributing to a tendency for pollutants to accumulate, particularly during periods of stagnant air. The surrounding landscape is a mosaic of agricultural land – primarily rice paddies and vegetable farms – interspersed with burgeoning industrial zones and smaller settlements. This urban-rural gradient is a defining feature, with Jinjicun acting as a node within a larger network of interconnected communities. The proximity to the Pearl River itself, though offering some potential for ventilation, also introduces the risk of riverine transport of pollutants. The region's climate is humid subtropical, with distinct wet and dry seasons, influencing local weather patterns and, consequently, air quality. The Pearl River Delta's extensive industrial belt, stretching from Shenzhen to Guangzhou, exerts a considerable influence on Jinjicun's air quality, with emissions from factories and transportation networks impacting the local atmosphere. The relatively small population of 16,493 suggests a primarily rural character, though its integration into the broader regional economy means it is not isolated from the impacts of industrial activity. Topography offers little natural barrier to pollutant dispersal, making the town susceptible to regional air pollution events.

Jinjicun's air quality follows a distinct seasonal pattern dictated by the region's humid subtropical climate and the influence of monsoonal weather systems. The dry season, typically spanning from October to April, often presents the most challenging conditions. Reduced rainfall and lower humidity contribute to a build-up of particulate matter and other pollutants. Temperature inversions, common during these months, trap cooler air near the ground, preventing vertical mixing and exacerbating the problem. November and December frequently experience periods of fog, further hindering dispersion. Conversely, the wet season, from May to September, brings relief through frequent rainfall, which naturally washes pollutants from the atmosphere. However, heavy rainfall can also lead to increased levels of ozone, a secondary pollutant formed through photochemical reactions. The summer monsoon winds, while generally beneficial for dispersing pollutants, can occasionally carry dust and pollutants from upwind regions. During the transition months of spring and autumn, air quality is typically more variable, influenced by shifting wind patterns and the gradual change in temperature. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of fog or temperature inversions. Limiting outdoor exertion and wearing appropriate masks can help mitigate exposure. The period from March to May often sees a gradual improvement in air quality as the wet season approaches, making it a more favourable time for outdoor activities.