YINCHUAN, June 16 (Xinhua) -- As a drone buzzed above the 110-kilovolt (kV) Lijia transmission line tower in Qingtongxia City, conducting a routine inspection, a curious flock of birds circled and settled on a corner of the tower, discovering an artificial rattan nest for temporary sanctuary.
Nourished by the Yellow River, the city in northwest China's Ningxia Hui Autonomous Region is a haven of aquatic plants a
