```
He put on Old Zhang's rain boots and stepped into the curtain of rain, and under the nearby street lamp, one could see that his hair had turned much grayer, his back had begun to hunch, and he had grown so thin it was pitiable.
"It's truly a sin."
Old Zhang couldn't help but sigh, "How come these children can't be like Doctor Tang? One after another, they push the elderly to the front. Here's a person nearly seventy years old, still burdened with endless worries."
"What a pity..."
He shook his head and walked out again.
The lights outside were still shining, and it seemed that the rain had grown heavier. The raindrops could only be seen hitting the ground, occasionally splashing up as his foot stepped down, scattering the rainwater in all directions.
