On September 25, 2016 (August 25, 2016 in the lunar calendar), China's "Sky Eye" project was completed. China's "Sky Eye" project, the world's largest single-aperture spherical radio telescope (FAST), is also vividly called China's "Sky Eye". It is one of the nine national science and technology infrastructures reviewed and determined by the National Science and Education Leading Group. It uses the original design of China scientists and the unique terrain conditions of the karst depression in southern Guizhou, my country, to build a high-sensitivity giant radio telescope the size of about 30 football fields. How far is the vision of China's "Sky Eye"? According to experts, China's "Sky Eye" may capture even radio signals that are tens of billions of light-years away, and may also discover the highly red-shifted giant maser galaxy, achieving the first methanol supermaser observation breakthrough outside the Milky Way; used to search and identify possible interstellar communication signals, find extraterrestrial civilizations, etc. How big is China's "Sky Eye"? It took 43 minutes to walk along the ring beam of FAST. The "eye sockets" of the "Sky Eye" are a ring beam made of steel. Climbing the ring beam and looking down, there are "nets" dotted in the huge sinkhole. FAST's ring beam is supported in mid-air by 50 steel columns ranging in height from 6 meters to 50 meters, with a circumference of about 1.6 kilometers. FAST has a diameter of 500 meters and consists of a spherical reflecting surface equivalent to the size of 30 football fields. After the completion of China's "Sky Eye", its sensitivity will be increased by about 10 times compared with the German Eisenberg 100-meter telescope known as the "largest machine on the ground"; compared with the American Arecibo 300-meter radio telescope, which was rated as the first of the top ten projects of the 20th century, the sensitivity of the "Sky Eye" is 2.25 times. The FAST project is hosted by the National Astronomical Observatory of the Chinese Academy of Sciences, and more than 100 scientific and technological backbones from more than 20 universities and research institutes across the country participated in this work. In July 2007, the FAST project was officially established. On March 25, 2011, the FAST project officially started construction. The world's largest spherical radio telescope will be completed on September 25, 2016. FAST engineering technicians at the National Astronomical Observatory said that the ability of the "Sky Eye" to listen to news outside the earth is closely related to its size. Simply put, the bigger your eyes, the farther you can see. What is particularly special is that this "Sky Eye" is not a "dead eye". FAST's cable network structure can automatically change with the movement of the celestial body, driving the 4450 reflective panels active on the cable network to change, which is enough to observe larger sky regions. Celestial bodies, at the same time, the feed cabin also moves with the cable network to collect radio waves emitted by celestial bodies. Just as humans roll their eyes and adjust the direction of their line of sight, there will be no dead spots in direction for them in the distant space. The scientific significance of the FAST project is very significant. Building telescopes is aimed at the scientific frontiers of the 21st century and looking for dark matter and dark energy. 99% of the mass and energy in the universe now know of its existence, but they don't know what its characteristics are. FAST not only inspires astronomers in China, but astronomers around the world are also watching it closely-hoping that this largest "eye" may be able to find aliens and solve the mystery of the origin of the universe. China's "Sky Eye" project completed China's "Sky Eye" project completed