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Farmers work in a rice field in Gaoqing County in Zibo City, east China's Shandong Province, June 21, 2018. Thursday marked the summer solstice, the northern hemisphere's longest day of the year. (Xinhua/Zhang Weitang)
Farmers work in a rice field in Gaoqing County in Zibo City, east China's Shandong Province, June 21, 2018. Thursday marked the summer solstice, the northern hemisphere's longest day of the year. (Xinhua/Zhang Weitang)