Warm-sector heavy Rainfall (WR) during the First Rainy Season (FRS) in South China remain significant challenges in research and operational forecasts. The older generation of scientists proposed the concept of WR during FRS in South China and revealed lots of outstanding research achievements on the South China heavy rainfall during the first South China heavy rainfall experiment in 1970s. Recently, a number of new findings have been obtained along with the modern meteorological detection methods, the higher performance computing power, and the launching of mesoscale heavy rainfall observation experiment. This paper focuses on the latest research advances in WR during FRS in South China over recent ten years, and conducts systematic reviews on these studies from four aspects: the definition of WR, multiscale weather features, formation mechanisms, and predictability. Finally, the existing issues and future directions of WR during FRS in South China are briefly discussed.