Beijing, January 3 (Youth.cn) - The first-generation unit of the Zhangzhou nuclear power plant, which is the world’s largest “Hualong One” nuclear power base, officially entered commercial operation on January 1st after successfully completing a demonstration run lasting 168 hours. Built by China National Nuclear Corp, the construction of the nuclear power unit marked a major step for the upcoming massive roll-out of the “Hualong One”. Photo/VCG