Completion of first Stage of Phase III expansion project strengthens vertically integrated model.

Yingli Green Energy Holding Company Limited (NYSE: YGE), a leading vertically integrated photovoltaic (PV) product manufacturer in China, today announced the completion of the first stage of its Phase III 500MW manufacturing expansion plan. The newly finished production lines add 100MW of total production capacity of polysilicon wafers, PV cells and PV modules, and effectively strengthen the Company’s vertically integrated business model. Yingli Green Energy started trial production of polysilicon ingots from the new lines on June 1, 2007 and following detailed testing and certain modifications, recently launched production at full capacity.

Mr. Liansheng Miao, Chairman and CEO of Yingli Green Energy, commented, “The launch of the new production lines doubles our total production capacity to 200MW and symbolizes the successful completion of the first stage of our Phase III 500MW manufacturing expansion plan. This will help us ensure that our future capacity meets the market’s growing demand and it also provides a proven model for the successful completion of the remaining stages of the plan. In addition to capacity expansion, the Phase III project includes an independent systems engineering research center, training center and R&D center. We believe these facilities will help us enhance our ingot and wafer manufacturing production processes, boost our output efficiency and improve the overall conversion efficiency of our PV cells and the power generation of our PV modules.”

Mr. Miao continued, “For the successful completion and operation of the centers and to further advance our technology, Dr. Nabih Cherradi, our Vice President of Technology, who has 16 years of the relevant industry experience, has been working closely with our Chief Technology Officer, Dr. Yao Guo Xiao, to help us upgrade our systems to be among the best according to global standards.”

About Yingli Green Energy

Yingli Green Energy Holding Company Limited (“Yingli Green Energy”) is one of the leading vertically integrated photovoltaic (PV) product manufacturers in China. Through the Company’s principal operating subsidiary, Baoding Tianwei Yingli New Energy Resources Co., Ltd., , Yingli Green Energy designs, manufactures and sells PV modules and designs, assembles, sells and installs PV systems that are connected to an electricity transmission grid or those that operate on a stand-alone basis. With 200MW of total annual production capacity in each of polysilicon ingots and wafers, PV cells and PV modules, Yingli Green Energy is currently one of the largest manufacturers of PV products in China. Additionally, Yingli Green Energy is one of the few large-scale PV companies in China to have adopted vertical integration as its business model. The Company expects to gradually expand annual production capacity of polysilicon ingots and wafers, PV cells and PV modules to 400 megawatts by the end of 2008 and to 600 megawatts by 2010. Yingli Green Energy sells PV modules under its own brand name, Yingli Solar, to PV system integrators and distributors located in various markets around the world, including Germany, Spain, China and the United States.