A technician operates a machine to cut monocrystalline silicon sticks at Luan Solar Technology Co, a subsidiary of Lu'An Group in Changzhi, Shanxi province, July 20. There are 22 companies engaged in the photovoltaic manufacturing industry across the province. A complete industrial chain from ingot casting to photovoltaic cell manufacturing and installation has been formed with quality PV products in high demand. [Photo/Xinhua]

A worker measures a monocrystalline silicon stick at Luan Solar Technology Co, a subsidiary of Lu'An Group in Changzhi, Shanxi province, July 20. [Photo/Xinhua]