Researchers witness the moment a plasma temperature of 120 million degrees Celsius is achieved for 100 seconds at the control center of the experimental advanced superconducting tokamak (EAST) on the early morning of May 28, 2021. Chinese scientists have set a new world record of achieving a plasma temperature of 120 million degrees Celsius for a period of 101 seconds in the latest experiment on Friday, a key step toward the test running of a fusion reactor. The experiment at the experimental advanced superconducting tokamak (EAST), or the "Chinese artificial sun," also realized a plasma temperature of 160 million degrees Celsius, lasting for 20 seconds. (Xinhua/Zhou Mu)

Staff members perform an upgrade to the experimental advanced superconducting tokamak (EAST) at the Hefei Institutes of Physical Science under the Chinese Academy of Sciences (CAS) on April 28, 2021. Chinese scientists have set a new world record of achieving a plasma temperature of 120 million degrees Celsius for a period of 101 seconds in the latest experiment on Friday, a key step toward the test running of a fusion reactor. The experiment at the experimental advanced superconducting tokamak (EAST), or the "Chinese artificial sun," also realized a plasma temperature of 160 million degrees Celsius, lasting for 20 seconds. (Xinhua/Zhou Mu)

Staff members perform an upgrade to the experimental advanced superconducting tokamak (EAST) at the Hefei Institutes of Physical Science under the Chinese Academy of Sciences (CAS) on April 13, 2021. Chinese scientists have set a new world record of achieving a plasma temperature of 120 million degrees Celsius for a period of 101 seconds in the latest experiment on Friday, a key step toward the test running of a fusion reactor. The experiment at the experimental advanced superconducting tokamak (EAST), or the "Chinese artificial sun," also realized a plasma temperature of 160 million degrees Celsius, lasting for 20 seconds. (Xinhua/Liu Junxi)

Photo taken on the early morning of May 28, 2021 shows a 10-second countdown to the experiment at the experimental advanced superconducting tokamak (EAST) at the control center of EAST. Chinese scientists have set a new world record of achieving a plasma temperature of 120 million degrees Celsius for a period of 101 seconds in the latest experiment on Friday, a key step toward the test running of a fusion reactor. The experiment at the experimental advanced superconducting tokamak (EAST), or the "Chinese artificial sun," also realized a plasma temperature of 160 million degrees Celsius, lasting for 20 seconds. (Xinhua/Zhou Mu)

A staff member performs an upgrade to the experimental advanced superconducting tokamak (EAST) at the Hefei Institutes of Physical Science under the Chinese Academy of Sciences (CAS) on April 28, 2021. Chinese scientists have set a new world record of achieving a plasma temperature of 120 million degrees Celsius for a period of 101 seconds in the latest experiment on Friday, a key step toward the test running of a fusion reactor. The experiment at the experimental advanced superconducting tokamak (EAST), or the "Chinese artificial sun," also realized a plasma temperature of 160 million degrees Celsius, lasting for 20 seconds. (Xinhua/Liu Junxi)