Chagba (2nd L), father of Luozhou Jigme, a child with congenital heart disease, signs on a consent of operation in Nangqian County, northwest China's Qinghai Province, Dec. 3, 2012. More than 500 children here will receive free heart disease test by doctors from Anhui Red Cross Cardiovascular Hospital and 15 children with congenital heart disease will be treated for free in Hefei, capital of east China's Anhui Province. [Xinhua]