Over 600 migratory swans wintering in the Manasi Lake Region Wetlands Park in northwest China's Xinjiang Uygur Autonomous Region have been fed corn by the park's workers as a continuous drop in temperature has made it very difficult for them to find food. Since December 10, the park has constantly been hit by dense fog and snow, with the lowest temperature down to minus 18 degrees Celsius and about 90 percent of the lakes frozen. Thick snow and ice have seriously affected the birds in finding food, and the birds have to survive on the poor rhizomes and leaves. To help the birds, workers of the park, braving the cold, take bags of corn to their habitats for their breakfast every morning. Now the corn they send every day has been increased from more than 300 kilograms last year to over 400 kilograms.