White Dew is the water droplets that form when water vapor condenses on the ground or near-earth objects after the weather turns cooler and the temperature drops, such as grasses and trees that are covered with dew in the morning.

Time to White Dew, summer winds are gradually replaced by winter winds, the cold air turned guard to attack, coupled with the sun's point of direct sunlight to the south, the northern hemisphere sunshine time becomes shorter, the intensity of the light is weakened, the ground radiant heat dissipation fast, so the temperature drop is gradually accelerated. White Dew basic end of the sultry heat of the summer days, the weather gradually turned cool, cold dew condensation. The ancients to the four seasons with five elements, autumn is gold, gold white, white to describe the autumn dew, so the name "white dew".

White Dew Three Waiting

One Waiting for the geese to come: after the white dew, the most sensitive to the climate of the collective migration of migratory birds. The geese begin to fly from the north to the south.

The Second Waiting for the Return of the Xuanbird: The Xuanbird specifically refers to the swallow, which is also going to fly to the south for the winter.

Third Waiting for the Birds: The word "shy" is the same as "delicacy", which is a kind of gourmet food. This means that the birds, sensing the austere atmosphere, have been storing food for the winter.

The above reference? Baidu Encyclopedia - White Dew