The reporter learned from the management committee of Lenghu Science and Technology Innovation Industrial Park in Qinghai Province that recently, the Zijinshan Observatory of the Chinese Academy of Sciences signed a cooperation agreement with the government of Haixi Mongolian and Tibetan Autonomous Prefecture of Qinghai Province on the project of "4.2 meter ground-based special astrometric telescope". With the support of the Chinese Academy of Sciences, the 4.2m ground-based special astrometric telescope was led by the Zijinshan Observatory. This telescope is aimed at independently constructing China's celestial spacetime benchmark, especially accurately grasping the orbits of major planets, dwarf planets, natural satellites, and asteroids in the solar system, independently establishing and continuously maintaining high-precision ephemeris of solar system celestial bodies, and serving the needs of space activities, deep space exploration, and so on. It is understood that the 4.2-meter ground-based dedicated astronomical measurement telescope adopts a dual reflector telescope optical system and is optimized for high-precision astronomical measurement of celestial bodies in the solar system. It can widely serve various astronomical scientific goals. Ping Yiding, a senior engineer at the Zijinshan Observatory of the Chinese Academy of Sciences, introduced that China currently does not have a universal precision measuring telescope with a 4-meter caliber. The launch of the development of a 4.2-meter ground-based special astrometric telescope will improve China's ground-based optical observation capability, further improve the layout of large aperture telescopes in China, and promote the leapfrog development of ground-based optical astronomy in China. It is reported that the Purple Mountain Observatory and the government of Haixi Prefecture have also signed a joint framework agreement for the construction of a submillimeter wave astronomical observation base, which will build an internationally leading 15 meter submillimeter wave telescope in the snow mountain pasture 150 kilometers northwest of Delingha City, Haixi Prefecture. The Cold Lake Astronomical Observation Base is located in the Saishitengshan area of Lenghu Town, Mangya City, Haixi Prefecture, Qinghai Province, on the northwest edge of the Qaidam Basin in China. The average elevation is about 4000 meters, and its astronomical observation conditions have reached world-class levels. (Lai Xin She)