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(231208) -- BEIJING, Dec. 8, 2023 (Xinhua) -- This file photo shows the PandaX-4T experiment facility, at the second phase of China Jinping Underground Laboratory in Liangshan Yi Autonomous Prefecture of southwest China's Sichuan Province. A 2,400-meter-deep physics laboratory in southwest China's Sichuan Province became operational on Thursday, making it the deepest and largest underground lab in the world. Scientists believe the laboratory provides a "clean" space for them to pursue the invisible substance known as dark matter. They said the extreme depth helps block most cosmic rays that mess with the observation. The Deep Underground and Ultra-low Radiation Background Facility for Frontier Physics Experiments (DURF) is located beneath Jinping Mountain in Sichuan's Liangshan Yi Autonomous Prefecture. The DURF, with a total room capacity of 330,000 cubic meters, is the second phase of China Jinping Underground Laboratory. It started construction in December 2020 and was jointly built by Tsinghua Un

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(EyesonSci)CHINA-SICHUAN-UNDERGROUND LAB-OPERATION (CN)

(231207) -- JINPING, Dec. 7, 2023 (Xinhua) -- This file photo shows the PandaX-4T experiment facility, at the second phase of China Jinping Underground Laboratory in Liangshan Yi Autonomous Prefecture of southwest China's Sichuan Province. A 2,400-meter-deep physics laboratory in southwest China's Sichuan Province became operational on Thursday, making it the deepest and largest underground lab in the world. Scientists believe the laboratory provides a "clean" space for them to pursue the invisible substance known as dark matter. They said the extreme depth helps block most cosmic rays that mess with the observation. The Deep Underground and Ultra-low Radiation Background Facility for Frontier Physics Experiments (DURF) is located beneath Jinping Mountain in Sichuan's Liangshan Yi Autonomous Prefecture. The DURF, with a total room capacity of 330,000 cubic meters, is the second phase of China Jinping Underground Laboratory. It started construction in December 2020 and was jointly built by Tsinghua University

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- A water-and-radon-proof layer is seen on the wall of the C hall of the second phase of China Jinping Underground Laboratory in southwest China's Sichuan Province, July 4, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the De

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Researcher Nie Qiyuan checks experimental data at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ultra-low Radi

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao (1st R) discusses with researchers at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ultra-lo

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao checks the operation of experimental equipment at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Researchers do experiment at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ultra-low Radiation background Faci

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao checks equipment inside a one-meter-thick polythene door at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Un

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao (L) and researcher Nie Qiyuan discuss on experimental data at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- This aerial photo taken on July 4, 2023 shows the Jinping tunnel where the China Jinping Underground Laboratory is located and the nearby Yalong River in southwest China's Sichuan Province. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construct

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao (R) works with researchers Liang Yifan (L) and Wang Yufeng at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- A researcher rubs the oxide layer of copper samples to do radiation examination at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the De

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Workers are seen at the construction site of the second phase of China Jinping Underground Laboratory in southwest China's Sichuan Province, July 4, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ult

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Researchers pour liquid nitrogen into a pot for experiment at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ul

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao walks to the C hall of the second phase of the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 4, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ult

E

(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao checks the operation of experimental equipment at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground

E

(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao checks experimental data at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ultra-low Radiatio

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Researcher Wang Yufeng pours liquid nitrogen into a pot at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ultra

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao checks a hypothermia liquid nitrogen shielding device at the C1 hall of the second phase of the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 4, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present,

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Researcher Jing Mingkun checks experimental data at the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and ultra-low Ra

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Doctor Yang Litao is seen at the drainage of the second phase of the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 4, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the construction of the Deep Underground and

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(EYESONSCI)CHINA-SICHUAN-CHINA JINPING UNDERGROUND LABORATORY-DARK MATTER (CN)

(230715) -- XICHANG, July 15, 2023 (Xinhua) -- Researchers of the China Dark Matter Experiment (CDEX) pose for a group photo outside the first phase of the China Jinping Underground Laboratory in southwest China's Sichuan Province, July 3, 2023. Jinping Mountain, located in the drainage basin of the Yalong River, the largest tributary of Jinsha River, has the highest altitude of 4,410 meters. The China Jinping Underground Laboratory (CJPL) is located in the middle of the 17.5 kilometer-long Jinping tunnel in southwest China's Sichuan Province. The laboratory, inaugurated in 2010, is an underground research facility with a rock overburden of about 2,400 meters. CJPL-I, the first phase of China Jinping Underground Laboratory (CJPL), has an experimental space of 4000 cubic meters. Since its launch, the China Dark Matter Experiment (CDEX) led by Tsinghua University and the PandaX led by Shanghai Jiaotong University have achieved more than 30 internationally leading dark matter research results. At present, the