Workers are assembling the last reflector panel for the single-aperture spherical telescope "FAST" in Pingtang County.

The 500-meter Aperture Spherical Radio Telescope, or FAST has 4,450 triangular reflector panels. It is similar in design to the Arecibo Observatory, using a natural hollow to provide support for the telescope dish. We are bringing you special coverage of the completion of the assembly process.