The arrival of Bailu, or White Dew, signals the autumn vibes are in full swing. The intolerable heat in southern China is about to dissipate, with osmanthus fragrance soon to waft through the city. In the north, however, the cool and crisp autumn air has set in, painting the sky with crimson evening hues.

During this time of the year, the temperature difference between day and night widens, bringing a chill to the mornings and evenings, water vapor condensed into dew.