N China's largest photovoltaic project begins to join power grid(6/6)

Working staff check solar panels at Xinyi photovoltaic power plant in Binhai District of Tianjin, north China, April 1. 2016. Xinyi photovoltaic power plant, the largest photovoltaic project in north China, officially began to join the power grid on Friday. (Xinhua/Yue Yuewei)