Staff members work at the High Energy Photon Source (HEPS) in Beijing, capital of China, June 30, 2024. Upon the completion of the vacuum circuit of its storage ring, the HEPS has entered the joint test stage on Monday. The HEPS is a major science infrastructure project built by the Institute of High Energy Physics under the Chinese Academy of Sciences. (Xinhua/Jin Liwang)

An aerial drone photo taken on Dec. 11, 2023 shows a view of the High Energy Photon Source (HEPS) in Beijing, capital of China. Upon the completion of the vacuum circuit of its storage ring, the HEPS has entered the joint test stage on Monday. The HEPS is a major science infrastructure project built by the Institute of High Energy Physics under the Chinese Academy of Sciences. (Xinhua/Jin Liwang)

Staff members work at the High Energy Photon Source (HEPS) in Beijing, capital of China, June 30, 2024. Upon the completion of the vacuum circuit of its storage ring, the HEPS has entered the joint test stage on Monday. The HEPS is a major science infrastructure project built by the Institute of High Energy Physics under the Chinese Academy of Sciences. (Xinhua/Jin Liwang)

This photo taken on June 30, 2024 shows the storage ring of the High Energy Photon Source (HEPS) in Beijing, capital of China. Upon the completion of the vacuum circuit of its storage ring, the HEPS has entered the joint test stage on Monday. The HEPS is a major science infrastructure project built by the Institute of High Energy Physics under the Chinese Academy of Sciences. (Xinhua/Jin Liwang)