This photo taken on Oct 18, 2022 shows morning dew on a plant in Yankou Town, Guang'an City of southwest China's Sichuan Province. First Frost, also known as Shuangjiang, is one of the 24 solar terms of the Chinese lunar calendar and will fall on Oct. 23 this year. Photo:Xinhua

This photo taken on Oct 16, 2022 shows hoarfrost on a plant in Shangri-La, Deqen Tibetan Autonomous Prefecture, southwest China's Yunnan Province. First Frost, also known as Shuangjiang, is one of the 24 solar terms of the Chinese lunar calendar and will fall on Oct. 23 this year. Photo:Xinhua

This photo taken on Oct 18, 2022 shows frost on a plant at a forest park in Qingzhou City of east China's Shandong Province. First Frost, also known as Shuangjiang, is one of the 24 solar terms of the Chinese lunar calendar and will fall on Oct 23 this year. Photo:Xinhua

This photo taken on Oct 14, 2022 shows a dandelion in Xigang Town, Tengzhou City of east China's Shandong Province. First Frost, also known as Shuangjiang, is one of the 24 solar terms of the Chinese lunar calendar and will fall on Oct 23 this year. Photo:Xinhua

This photo taken on Oct 17, 2022 shows rain drops hanging on a chrysanthemum in Lijiang City of southwest China's Yunnan Province. First Frost, also known as Shuangjiang, is one of the 24 solar terms of the Chinese lunar calendar and will fall on Oct 23 this year. Photo:Xinhua