Volunteers and autistic children sing songs at a birthday party during a charity event held at the Luohu Adolescent Activities Center yesterday. Some 30 volunteers, including some expats,  attended the event marking World Autism Awareness Day, which fell on yesterday. Autism patients are dubbed by some as the “children of the stars,” because they are always immersed in their own “world” with a different mindset from other people.    (More on P2)  Sun Yuchen