This undated photo shows the Chinese-designed and -developed Experimental Advanced Superconducting Tokamak at the Hefei Institutes of Physical Science of the Chinese Academy of Sciences in Hefei, East China's Anhui province. (Photos: Xinhua)

This undated aerial photo shows the Hefei Institutes of Physical Science of the Chinese Academy of Sciences (CASHIPS) in Hefei, East China's Anhui province.

Three Italian scientists discuss with researchers of the Institute of Plasma Physics of the Chinese Academy of Sciences at central control hall of the Experimental Advanced Superconducting Tokamak in Hefei, East China's Anhui province, Dec 5, 2019.

Shigeru Morita (2nd R), a professor from the National Institute for Fusion Science of Japan, poses for a group photo with staff members of the Institute of Plasma Physics of the Chinese Academy of Sciences at the Hefei Institutes of Physical Science of the Chinese Academy of Sciences in Hefei, East China's Anhui province, Nov 25, 2019.