What is the appreciation of till at dusk, when the drifts are crushing our tents and and our frozen red flags cannot flutter in the wind?

Appreciation

The word "stopper" indicates that the wind is very strong, as if it were tugging at the red flag—here, the wind is personified. But the red flag has been frozen by the snow and ice, so it can't be rolled up any more. The snow and the cold weather are vividly written. Snow can be reflected from "red", and cold can be reflected from "not turning".

is from a Song of White Snow in Farewell to Field-Clerk Wu Going Home, which is the work of Cen Can, a poet in the Tang Dynasty. This poem describes the magnificent scenery of flying snow in the western regions in August, expresses the feelings of seeing guests off beyond the Great Wall and seeing them off in the snow, and expresses sadness and homesickness, but it is full of whimsy and does not make people feel sad.

the original text is as follows:

the north wind rolls the white grasses and breaks them, and the Eighth-month snow across the Tartar sky.

is like a spring gale, come up in the night, blowing open the petals of ten thousand pear trees.

it enters the pearl blinds, it wets the silk curtains, a fur coat feels cold, a cotton mat flimsy.

bows become rigid, can hardly be drawn, it's hard to protect your iron clothes.

the sand-sea deepens with fathomless ice, the gloom is bleak and Wan Li is condensed.

but we drink to our guest bound home from camp, and play him barbarian lutes, guitars, harps.

till at dusk, when the drifts are crushing our tents, and our frozen red flags cannot flutter in the wind.