Wendy Mao (毛立文), Stanford’s Earth Sciences Chair and Deputy Director of Stanford’s Institute for Materials and Energy Sciences at SLAC, has co-authored over 50 publications, trained 5 employees, and maintained a visiting scholar position at 
HPSTAR, an “alias” for China's nuclear weapons program.
In 2020, the Center for High Pressure Science and Technology, or HPSTAR, was added to 
Department of Commerce's Entity List, which identifies organizations that pose a significant risk to national security. Since its 2020 Entity List designation, Mao has co-authoredat least 12 peer-reviewed papers with HPSTAR.
The US Entity List describes HPSTAR as an organization “owned by, operated by, or directly affiliated with the Chinese Academy of Engineering Physics (CAEP), which is the technology complex responsible for the research, development and testing of China's nuclear weapons and has been on the Entity List under the destination of China since June 30, 1997.”
According to Canada's 2024 Named Research Organizations List, HPSTAR is an “alias” for the institution behind China’s nuclear weapons program.
HPSTAR studies how materials behave under extreme pressures and temperatures using diamond-anvil cells, synchrotron beams, and X-ray diffraction. Mao is a leading US researcher in this very field.
"It is true that high-pressure experiments are used by scientists working on the domain of nuclear weapons. If anyone is using the diamond anvil cell or shock waves to study materials relevant to nuclear weapons, that's highly sensitive. If those same methods are then applied to sensitive nuclear materials, the combination of these kinds of experiments with these materials starts raising eyebrows."
Both Mao and HPSTAR extensively use diamond anvil cells and shock waves to study materials.
Mao and HPSTAR’s public research papers do not directly involve weapons testing, design, or development. However, these precise high-pressure measurements and theoretical knowledge are the necessary foundations of modern nuclear and advanced weapon design, where accurate modeling of materials under detonation-level conditions is critical.
Over the past two decades, Mao has co-authored at least 50 publications with HPSTAR. Funding acknowledgments show that Wendy Mao and HPSTAR co-authored research financed by US government agencies including DOE (including the National Nuclear Security Administration [NNSA], Argonne National Laboratory, Lawrence Berkeley National Laboratory, Oak Ridge National Laboratory, and Brookhaven National Laboratory); DARPA; DOD; NSF; NIH; ARO; NASA.
Mao has trained at least five HPSTAR employees as PhD students in her Stanford and SLAC labs. At least one HPSTAR postdoctoral researcher simultaneously worked on DOE, NNSA, and DARPA-funded research at SLAC.
For example, one of Mao’s current PhD students worked at HPSTAR for three years, from 2015 to 2018, receiving an MS in Condensed Matter Physics before joining Stanford as a PhD student in Mao’s lab.
The other four were trained in Mao’s lab and returned to China to work at HPSTAR. These are only the individuals we were able to identify via web and archival searches.
“Mao has trained 5 PhD students affiliated with China’s nuclear weapons program. Stanford should not permit its federally funded research labs to become training grounds for entities affiliated with China’s nuclear program. Mao’s continued and extensive academic collaboration with HPSTAR is adequate grounds for termination.”
Mao served as a visiting scholar at HPSTAR’s Shanghai laboratory from at least 2016 to 2019. She also maintains a HPSTAR email address. Her internal Stanford CV and profile list 43 affiliations, but they do not disclose her position at HPSTAR.
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stanfordreview.org/investigation-
HPSTAR, an “alias” for China's nuclear weapons program.
In 2020, the Center for High Pressure Science and Technology, or HPSTAR, was added to Department of Commerce's Entity List, which identifies organizations that pose a significant risk to national security. Since its 2020 Entity List designation, Mao has co-authoredat least 12 peer-reviewed papers with HPSTAR.
The US Entity List describes HPSTAR as an organization “owned by, operated by, or directly affiliated with the Chinese Academy of Engineering Physics (CAEP), which is the technology complex responsible for the research, development and testing of China's nuclear weapons and has been on the Entity List under the destination of China since June 30, 1997.”
According to Canada's 2024 Named Research Organizations List, HPSTAR is an “alias” for the institution behind China’s nuclear weapons program.
HPSTAR studies how materials behave under extreme pressures and temperatures using diamond-anvil cells, synchrotron beams, and X-ray diffraction. Mao is a leading US researcher in this very field.
"It is true that high-pressure experiments are used by scientists working on the domain of nuclear weapons. If anyone is using the diamond anvil cell or shock waves to study materials relevant to nuclear weapons, that's highly sensitive. If those same methods are then applied to sensitive nuclear materials, the combination of these kinds of experiments with these materials starts raising eyebrows."
Both Mao and HPSTAR extensively use diamond anvil cells and shock waves to study materials.
Mao and HPSTAR’s public research papers do not directly involve weapons testing, design, or development. However, these precise high-pressure measurements and theoretical knowledge are the necessary foundations of modern nuclear and advanced weapon design, where accurate modeling of materials under detonation-level conditions is critical.
Over the past two decades, Mao has co-authored at least 50 publications with HPSTAR. Funding acknowledgments show that Wendy Mao and HPSTAR co-authored research financed by US government agencies including DOE (including the National Nuclear Security Administration [NNSA], Argonne National Laboratory, Lawrence Berkeley National Laboratory, Oak Ridge National Laboratory, and Brookhaven National Laboratory); DARPA; DOD; NSF; NIH; ARO; NASA.
Mao has trained at least five HPSTAR employees as PhD students in her Stanford and SLAC labs. At least one HPSTAR postdoctoral researcher simultaneously worked on DOE, NNSA, and DARPA-funded research at SLAC.
For example, one of Mao’s current PhD students worked at HPSTAR for three years, from 2015 to 2018, receiving an MS in Condensed Matter Physics before joining Stanford as a PhD student in Mao’s lab.
The other four were trained in Mao’s lab and returned to China to work at HPSTAR. These are only the individuals we were able to identify via web and archival searches.
“Mao has trained 5 PhD students affiliated with China’s nuclear weapons program. Stanford should not permit its federally funded research labs to become training grounds for entities affiliated with China’s nuclear program. Mao’s continued and extensive academic collaboration with HPSTAR is adequate grounds for termination.”
Mao served as a visiting scholar at HPSTAR’s Shanghai laboratory from at least 2016 to 2019. She also maintains a HPSTAR email address. Her internal Stanford CV and profile list 43 affiliations, but they do not disclose her position at HPSTAR.
1/n
stanfordreview.org/investigation-