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(190402) -- HARBIN, April 2, 2019 (Xinhua) -- Children with Autism Spectrum Disorder (ASD) watch a white whale performance with their parents at the Polarland in Harbin, capital of northeast China's Heilongjiang Province, April 2, 2019, the World Autism Awareness Day. World Autism Awareness Day on April 2 every year is designated to encourage member states of the United Nations to take measures to raise awareness about people with ASD throughout the world. (Xinhua/Wang Jianwei)