Yingli Green Energy Holding Company Limited is a leading vertically integrated manufacturer of photovoltaic products in China. Yingli was incorporated in the Cayman Islands in August and operates through its principal operating subsidiary, Baoding Tianwei Yingli New Energy Resources Co., Ltd. or Tianwei Yingli, based in Baoding, Hebei Province, eighty five kilometers south of Beijing. When Yingli Green Energy began production of polysilicon wafers, its annual production capacity has expanded from three megawatts of PV modules to ninety five megawatts of polysilicon ingots and wafers, ninety megawatts of photovoltaic, or PV, cells and hundred megawatts of PV modules.