Combined with the original work, talk about why Xiangzi was "too scared to stand up again"

Because Xiangzi has lost his kindness and become insensitive.

Xiangzi has become insensitive. I think duckweed is his good qualities such as hard work and kindness, while water scorpion and small fish are the dark society and those evil forces. They are eating Xiangzi's heart bit by bit. It was he who caused Xiangzi's numbness. "I accidentally picked up a small stone, threw it into the water, splashed some water and sprinkled a lot of duckweeds", which meant that Xiangzi was also destroying himself. Therefore, in this passage, Xiangzi looked at the stream, not only the stream, but also his own life. He shattered the duckweed and the simple and kind high wall built in his heart.

Xiangzi, a simple young man, was simple when he first came to the county, and he had a dream-a car of his own! He fought for his dream. He shuttled through the wind and rain, tired but excited. He ran barefoot on the ground, painful and happy. He is a humble driver, struggling for his dream, persistent for a small goal and doing his best. But such a young man was born in such a dark age. Warlords rob cars, detectives cheat money, and beloved women hang themselves to sell cars for a living? Everything exposed the darkness of society. The fate of Xiangzi, a camel, fluctuates like a camel's hump, and simple youth has become a walking corpse and a victim of the old society. Xiangzi is just a microcosm of the figures in the old society, a young man who was forced, and a man who was sealed by the times.