The Institute of High Energy Physics of Chinese Academy of Sciences (IHEP, CAS) was established in February 1973. As a leading high energy physics research center and a large-scale, multidisciplinary research base with significant international influence, IHEP is dedicated to high energy physics, particle astrophysics, accelerator physics and technology, as well as radiation technology and its applications. It embraces the vital mission of exploring the ultra-microscopic and ultra-macroscopic worlds of matter while serving the nation’s strategic needs.

Since the completion of China’s first large research infrastructure, the Beijing Electron Positron Collider (BEPC), in 1988, IHEP has become a respected player in the international high energy physics community. Through extensive international collaboration, IHEP has developed a governance system and an innovative research culture tailored to the construction and operation of large research infrastructure.

Over the decades, with multiple upgrades, the Beijing Electron Positron Collider has maintained international leadership in tau-charm physics research. The Daya Bay Neutrino Experiment discovered a new mode of neutrino oscillation, while satellites such as HXMT (Hard X-ray Modulation Telescope) and GECAM (Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor) have achieved groundbreaking results in extreme astrophysics. The Large High Altitude Air Shower Observatory has ushered in the era of “ultra-high-energy gamma-ray astronomy.” Meanwhile, the Beijing Synchrotron Radiation Facility and the China Spallation Neutron Source have played pivotal roles in addressing critical national needs. In core accelerator and detector technologies, IHEP has also advanced to the forefront of global research.

Looking ahead, projects like the Jiangmen Underground Neutrino Observatory (JUNO), the High Energy Photon Source (HEPS), and the Ali Cosmic Microwave Background Polarization Telescope (AliCPT) are nearing completion. Meanwhile, the second phase of the China Spallation Neutron Source (CSNS-II), enhanced X-ray Timing and Polarimetry mission (eXTP), High Energy Cosmic Radiation Detection Facility (HERD) on China’s space station, the Circular Electron Positron Collider (CEPC), and High-energy Underwater Neutrino Telescope are under construction or in planning. These state-of-the-art facilities will produce original, globally impactful scientific achievements while providing cutting-edge platforms for fundamental research and industrial innovation.

Staying true to our founding mission, we continue to forge ahead. In this new historical era, IHEP is committed to fully realizing the “Four Pioneering Initiatives” and the “Two Accelerations and One Endeavor,” translating responsibility into action and unity into strength. IHEP will continue striving to contribute to China’s scientific and technological self-reliance and self-strengthening.

We extend our deepest gratitude to government agencies, partner institutions, and friends both in China and around the world for their enduring support. We warmly welcome outstanding talent from around the world to join us in driving innovation and advancing China’s scientific and technological progress together!