Why is there heavy fog in Jiangsu?

Jiangsu has poor atmospheric diffusion conditions due to low wind speed and high humidity near the ground. According to relevant public information, Liu Mei, chief forecaster of the Jiangsu Provincial Meteorological Observatory, said on November 11, 2022 that the atmospheric diffusion conditions in autumn and winter are usually poor. Under the premise of low wind speed, the near-ground humidity conditions are better or accompanied by obvious A temperature inversion may lead to foggy weather.