This file photo shows the exterior view of Shidaowan high temperature gas-cooled reactor nuclear power plant. (Photo by Song Kunyang/Xinhua)

This file photo shows the exterior view of Shidaowan high temperature gas-cooled reactor nuclear power plant. (Photo by Sun Wenzhan/Xinhua)

The first reactor pressure vessel of Shidaowan high temperature gas-cooled reactor nuclear power plant is hoisted in place on March 20, 2016. (Photo by Ma Yuejun/Xinhua)

The first steam generator of Shidaowan high temperature gas-cooled reactor nuclear power plant is hoisted in place on Jan. 27, 2019. (Photo by Song Kunyang/Xinhua)