It was to be the largest machine in the scientific world. Ten years ago, China announced it wanted to build a giant particle accelerator called the Circular Electron Positron Collider (CEPC). With a planned length of 100 kilometers, it would not only have clearly outstripped Cern’s Large Hadron Collider (LHC), which is 27 km long. The CEPC would also have been slightly larger than the European LHC successor project to the Future Circular Collider (FCC) at 90.7 km. But nothing comes of this for the time being, China has put the project on ice.
