"Autumn mountain has bones, but the first frost has no traces of water". What season is the solar term of the first frost?

The first frost is the last solar term in autumn. It means that winter is about to begin, when the temperature gradually drops below 0 degrees Celsius, and the water vapor in the air condenses on the ground and becomes white crystals, which is called frost.

The first frost is the beginning of the transition from autumn to winter. Thirdly, there are obvious seasonal changes in nature. The autumn leaves are red, the layers of forest are dyed, like fire, and the wind and frost trees dive deep.

There were three waits for the first frost.

The jackal is a sacrificial animal. Jackals began to catch a lot of prey and fatten themselves up to survive the winter when it was difficult to find food. The exhibition of killing animals by the first frost was called "offering autumn gold" by the ancients, and it was a ceremony to bid farewell to autumn.

Second, wait for "everything is yellow." The leaves of the wood leaves rustle, and winter is coming.

Third, "stinging insects are salty." "salty" means everything, "prone" means bowing, insects and birds don't eat in caves, but hang their heads and go into hibernation.