@why.history: Why do people climb hills on the Double Ninth Festival? And why eat a special cake? This 7-minute story explores the festival's origins, legends, poetry, and customs—from chrysanthemums to family reunions. Ancient scenes are AI artistic reconstructions, not archival footage. Chinese narration with English and Chinese subtitles. How does your family mark this day? 人们为什么在重阳节爬山?为什么要吃特制的糕点?这个7分钟的故事会探索节日的起源、传说、诗歌和习俗——从菊花到家庭团聚。古代场景是AI艺术重建,并非档案影像。中文讲解,配有中英文字幕。你的家人如何庆祝这一天? #DoubleNinthFestival #ChongyangFestival #ChineseCulture #ChineseTraditions