 The analysis shows that the East Asian winterman soon weakened, after the mid-1980s due to changes in North Pacific and Eurasian circulation patterns, which led to a robust warming over the East Asian region. This was caused by weakening of the 300-HPA East Asian jet and 500-HPA trough, weakened northerly winds in Siberia, and enhanced southeast lies, over the East China Sea due to an NPO-like sea-level pressure pattern. The advection of mean temperature by anomalous wind and anomalous temperature by mean wind contributed to the anomalous warm advection in the region after the mid-1980s, providing a more favourable environment for weakening of the EAWM. This article was offered by Sun Xi'an Li, Xi'an Wakhim, John Gap June, and others.