Workers are seen at the construction site of the second phase of the China Jinping Underground Laboratory in southwest China's Sichuan Province, Sept. 19, 2023. Nestled beneath the Jinping Mountain near the Yalong River in southwest China's Sichuan Province, an advanced physics laboratory designed to unveil the mysteries of the universe is currently under construction deep underground. (Xinhua/Xue Chen)

A researcher works at the China Jinping Underground Laboratory in southwest China's Sichuan Province, Sept. 19, 2023. Nestled beneath the Jinping Mountain near the Yalong River in southwest China's Sichuan Province, an advanced physics laboratory designed to unveil the mysteries of the universe is currently under construction deep underground. (Xinhua/Xue Chen)

A researcher conducts experiment at the China Jinping Underground Laboratory in southwest China's Sichuan Province, Sept. 19, 2023. Nestled beneath the Jinping Mountain near the Yalong River in southwest China's Sichuan Province, an advanced physics laboratory designed to unveil the mysteries of the universe is currently under construction deep underground. (Xinhua/Xue Chen)