Which solar term can thaw 2 inches deep?

The slight cold solar terms can thaw 2 inches deep. Slight cold means that the air is cold for a long time, just as severe cold and mild heat, and heat means that the air is hot or cold for a long time. Slight cold means that the air is cold for a long time, just like a desert storm that can't produce sand and stones. Just like breathing for a long time in winter, water won't form thick ice. Exposure to cold environment for a long time is like the freezing environment of heavy snow dropping to minus 5 degrees, and continuous exposure to 12 days will only form a thick layer of ice. In short, slight cold means that the air is cold for a long time, just as the summer solar terms reproduce the process of warm weather, and the great cold solar terms reproduce the cold air mass, which can only be cold and warm weather, only a short-term cold.