Photo shows that 78.47 percent of the world's biggest single caliber radio telescope "FAST" (500 - meter aperture spherical radio telescope, known as "view day eye") in Guizhou, SW China has been installed and it is expected to be completed by April, 2016. (Xinhua Photo)

Photo shows that 78.47 percent of the world's biggest single caliber radio telescope "FAST" (500 - meter aperture spherical radio telescope, known as "view day eye") in Guizhou, SW China has been installed and it is expected to be completed by April, 2016. (Xinhua Photo)

Photo shows that 78.47 percent of the world's biggest single caliber radio telescope "FAST" (500 - meter aperture spherical radio telescope, known as "view day eye") in Guizhou, SW China has been installed and it is expected to be completed by April, 2016. (Xinhua Photo)