Pakistani Prime Minister Yousuf Raza Gilani on Thursday inaugurated a 330-megawatt nuclear power plant built with Chinese assistance.
The plant is at Chashma in central Punjab province, where a Chinese-aided power plant of similar capacity is already operational.
"Today is a proud day for Pakistan and for Pakistan's civil nuclear energy programme," Gilani said as he commissioned the second unit.
"It is yet another illustrious example of the Pakistan-China cooperation in the field of nuclear science and technology," he said.
The opening of Chashma-2 comes as Gilani is due to make a four-day official visit to China next week, with Pakistan under pressure over the US killing of Osama bin Laden in a covert raid in a garrison city in the country on May 2.