Abstract South China is one of the most frequently affected regions by landfalling tropical cyclones (TCs) worldwide. Owing to its complex topography and environmental conditions, TC precipitation in this region typically exhibits pronounced asymmetry, with substantially stronger rainfall on the southern‐side of the TC center. Here, we show that precipitation asymmetry has decreased by 29% during 1998–2024. Specifically, a significant increase in the area‐averaged precipitation rate is observed on the northern‐side of TC center, accompanied by a decrease on the southern‐side. Diagnostic analyses indicate that this change is closely associated with the weakening of the vertical wind shear (VWS) at an average rate of 0.046 m s−1 per year, along with concurrent changes in upper‐ and lower‐level divergence and vertical motion. These dynamical changes collectively contribute to enhanced precipitation on the northern‐side of TC center, suggesting an increasing potential risk of rainfall impacts in this region.