Photo taken on March 17, 2026 shows children experiencing the fun of measuring wind speed by blowing air at an observation field of the meteorological bureau in Yongnian District, Handan City, north China's Hebei Province. On the day, the local science and technology association, together with a kindergarten in the district, organized a meteorological science popularization activity. Children visited a meteorological station and observation site, observed various instruments up close, experienced wind speed measurement firsthand, and learned about meteorological monitoring, welcoming the upcoming World Meteorological Day. (Hu Gaolei/Guangming Picture)
Photo taken on March 17, 2026 shows a staff member explaining the function of a sundial to children at the meteorological bureau in Yongnian District, Handan City, north China's Hebei Province. (Hu Gaolei/Guangming Picture)
Photo taken on March 17, 2026 shows a staff member explaining the working principle of a rainfall sensor to children at an observation field of the meteorological bureau in Yongnian District, Handan City, north China's Hebei Province. (Hu Gaolei/Guangming Picture)
Photo taken on March 17, 2026 shows a staff member explaining how deep soil temperature is monitored to children at an observation field of the meteorological bureau in Yongnian District, Handan City, north China's Hebei Province. (Hu Gaolei/Guangming Picture)
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