They are better at spying than you
The $180m radio telescope, the size of 30 football fields, is expected to be operational by September.
China has put the final piece of what is set to be the world's largest radio telescope in place, state media have reported.
The "Five-hundred-metre Aperture Spherical Telescope", or FAST, is the size of 30 football fields and has been hewn out of a mountain in the southwestern province of Guizhou.
China puts final touches to world's largest telescope - News from Al Jazeera