那时秋天
[nèi shí qiū tiān]
'Back then, in the fall' refers back to a certain time in the past when it was autumn. Using a season to recall the past often adds depth to personal narratives, possibly conveying wistful sentiments about memories formed during a special period marked by the change in seasons to autumn, evoking feelings of warmth, bittersweet remembrance or melancholy longing.