In the early snow of winter, he stood on the top of the mountain in a single coat, and the hunting mountain wind made his face hurt. She stepped forward and put the fox fur coat on his shoulders, but he was completely unaware and did not react at all, as if everything in the world was not worth mentioning. She lowered her head, the tip of her nose was sore, and a line of clear tears fell slowly. She understood that some people are irreplaceable.