What weather in Northeast China loves fog?

Winter in Northeast China is mainly due to the frequent southward movement of cold air at high latitudes, which leads to the condensation of water vapor in the atmosphere. As we all know, most parts of Northeast China belong to temperate monsoon climate, close to the ocean, with a large area of humid and semi-humid areas, and the water vapor content in the atmosphere is relatively high. In winter, cold air will condense and form foggy weather.