 In a Phase II development two CPR-1000 reactors, Ling Ao II-1 and II-2 (alternatively, units 3 and 4), were constructed in conjunction with Areva, based on the French three cooling loop design.Ling Ao II-1, China’s first domestic CPR-1000 nuclear power plant, was first connected to the grid on 15 July 2010, having started criticality testing on 11 June 2010.It started commercial operations on 27 September 2010.