How many days did the snow sting?

The snow was so heavy that it rained for almost a hundred days.

The ancients concluded that the plague began with heavy snow, was born in slight cold, was weaker than rain, and died of fright. The plague began with heavy snow, originated from the solstice of winter, was born in slight cold, flourished in the beginning of spring, declined in rain, declined in fright, and finally became clear at the vernal equinox. In fact, it is the change of plague in each solar term. For thousands of years, all the plagues in China have followed this law.