Main plot of camel Xiangzi old horse

The main plot of the old horse in this novel is as follows:

In Camel Xiangzi, Xiangzi was waiting for Mr. Cao to watch a movie in the teahouse, and he met an old coachman, an old horse, a grandson and a pony, hungry and cold. The old horse is an old coachman. He has been strong all his life, but he can't save his grandson in the end. My son never came back as a soldier, and my daughter-in-law left. In the end, only my grandson Pony and I were left, living in our own broken car. The tragic fate of the old horse deeply stimulated Xiangzi. Out of kindness, he bought ten steamed buns for his grandparents and grandchildren.

The old horse fainted from hunger in the teahouse, and everyone's concern made Xiangzi realize that the old horse was his future, and Xiangzi began to feel a kind of discomfort that he had never felt before. This plot reflects the destruction and persecution of the working people at the bottom in the dark and chaotic old society, and also indicates the social root of Xiangzi's tragic fate, which has become one of the key factors for the change of Xiangzi's attitude towards life.