What city is the fog in China?

The fog is Chongqing. Chongqing has 104 foggy days every year on average. Wuyun in Bishan District of Chongqing has as many as 204 foggy days all year round, which is a veritable foggy city. Chongqing is located in the southeast edge of Sichuan Basin, and the surrounding mountains make the wind speed here low, while the Yangtze River and Jialing River make the water vapor source here quite abundant and the air relatively humid. The higher ground temperature during the day makes the evaporation of water vapor increase continuously, which makes the air contain a lot of water vapor. At the same time, the cold air at the edge of the basin will sink along the hillside, which will make the air near the ground cool very sharply, and eventually lead to the continuous reduction of the ability to contain water vapor in the air, and the excess water vapor will condense to form fog.