Abstract: The data set of 1963-1982 was used to analyse the mean circulation for winters with abnormal monsoon in relation to early summer rainfall in South China, indicating that strong monsoon years see weaker 500 hPa subtropical high over the West Pacific and westerlies throughout Asia,more southward East Asia Trough, stronger and more northward 200 hPa westerly jet across 115°E. In the years of weak monsoon, the features are almost opposite.In the late season, circulation systems gradually evolve into their summer type in mid-and-highlatitudes with great changes in the subtropical high. In contrast, the systems of the same latitudes repeat themselves in their transition and the high goes north with slow increase in intensity, in years of weak monsoon.In strong monsoon years, early summer sees stronger and more northward 500 hPa subtropical high over the West Pacific, far-westward extended 100 hPa South Asia High and below-mean rainfall for South China.In weak monsoon years, early summer sees opposite features from the strong monsoon cases.