What scenery does the poem describe? Please, great gods.

The sentence "The white dew is frost" points out the time and environment from the image and color. The dense reeds growing by the river are pale blue in color, and the crystal clear dew drops have condensed into thick frost with white brush. The slight autumn wind sends a chill to people, and the boundless autumn water is chilly. In this particular time and space in the bleak and secluded late autumn morning, the poet sometimes stands still, sometimes wanders, sometimes looks up and sometimes frowns and meditates. His anxious and restless mood appeared before our eyes from time to time. It turned out that he was longing for a friend.