By the end of 2021，China had 20 nuclear power units under construction，with a total installed capacity of 21.429 million kilowatts. The installed capacity of nuclear power units under construction continued to rank first in the world. And 6 nuclear power units were newly started in 2021. In 2021，China’s nuclear power projects under construction steadily promoted. The project safety，quality，progress，investment，technology，environment protection and other aspects effectively controlled.