A girl signs her name on a banner appealing for care for autistic children at a charity event marking the upcoming World Autism Awareness Day in Tianjin, north China, March 31, 2013. The acitivity aimed to call for public care for autistic children by selling autistic children's paintings and introducing general knowledge of autism. (Xinhua/Zhang Chaoqun)

Children sign their names on a banner appealing for care for autistic children at a charity event marking the upcoming World Autism Awareness Day in Tianjin, north China, March 31, 2013. The acitivity aimed to call for public care for autistic children by selling autistic children's paintings and introducing general knowledge of autism. (Xinhua/Zhang Chaoqun)