The old man was lying on the creaking couch, swinging the cattail fan, half-squinting his eyes, looking at the sunlight between the trees, and thinking of the years he spent with him. The background is the Republic of China, the early days of the Anti-Japanese War. The protagonist will not be written on the battlefield, but will be written in the rear, so the span is very large, and it may be □□, 1v1