The installation of reflectors on the world's largest radio telescope has begun, marking the start of a final key stage of the telescope's construction.

Located in a natural valley of Southwest China's Guizhou province, the 500-meter aperture spherical radio telescope, known as the FAST Project, had its first reflecting unit installed in early August.

Wuchang Shipbuilding Industry Group, a company in Hubei province responsible for installing the reflectors, said the reflector surface, with a diameter of 500 meters, consists of 4,450 reflecting units. About 20 units can be installed a day, and the installation is due to be completed by March next year.