A series of activities were held at Beijing Children's Hospital to mark the upcoming Children's Day and raise awareness of children with blood diseases. (Photos: Xinhua)

A little patient with blood disease reacts when watching Children's Day performance at Beijing Children's Hospital in Beijing, capital of China, May 29, 2019.

A little patient with blood disease performs martial art on stage at Beijing Children's Hospital in Beijing, capital of China, May 29, 2019.

Little patients with blood disease play paper cutting at Beijing Children's Hospital in Beijing, capital of China, May 29, 2019.

Doctor Jin ling (L) presents a gift to a patient with blood disease for the upcoming Children's Day at Beijing Children's Hospital in Beijing, capital of China, May 29, 2019.

Little patients with blood disease react during Children's Day celebrations at Beijing Children's Hospital in Beijing, capital of China, May 29, 2019.

A little patient with blood disease performs on stage at Beijing Children's Hospital in Beijing, capital of China, May 29, 2019.