桂花飘香、胡杨金黄、黄栌换上五彩“盛装” 秋日中国铺展斑斓好风光

Group 1 - The core point of the article highlights the delayed blooming of osmanthus flowers in regions like Shanghai and Zhejiang due to higher than usual temperatures this year, with blooms occurring over 20 days later than last year [3][7][10] - In Shanghai's Qingpu District, the first signs of osmanthus flowers are noted, with a subtle fragrance in the air, indicating the beginning of the blooming season [1] - In Hangzhou, the osmanthus flowers have just started to bloom, with most still in bud form, but conditions are expected to improve for a fuller bloom in the coming weeks [4][7] Group 2 - The article discusses the sensitivity of osmanthus flowers to temperature and humidity, noting that they typically require temperatures below 24°C to bloom effectively [8] - In Hefei, osmanthus flowers are experiencing a second bloom due to a recent drop in temperature, which has allowed previously interrupted blooms to resume [11][13] - The article also mentions the optimal viewing periods for other natural phenomena, such as the autumn foliage in Hebei and the golden poplar trees in Ningxia, indicating a broader seasonal trend in nature [14][19]