A boy raises the V sign as a doctor from the Xinqiao Hospital of the Third Military Medical University performs an echocardiography inspection on him on Oct 17 in Southwest China’s Chongqing Municipality. [Photo by Tang Yi/Xinhua]

A doctor from the Xinqiao Hospital of the Third Military Medical University checks on a girl after she received a free congenital heart disease operation on Oct 17. [Photo by Tang Yi/Xinhua]

A mom gives pills to children in the hospital ward. Twelve children suffering from congenital heart disease from Northwest China's Xinjiang Uygur autonomous region received free operations on Oct 17. [Photo by Tang Yi/Xinhua]