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Chinese crested terns rest at the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 7, 2020. (Xinhua/Mei Yongcun)

Chinese crested terns rest at the Minjiang River estuary wetlands in Fuzhou, southeast China's Fujian Province, April 7, 2020. (Xinhua/Mei Yongcun)