"Obtaining UL's CTDP certification is representative of the Company's dedication to technology and product quality"

BAODING, China, July 31, 2013 -- Yingli Green Energy Holding Company Limited (NYSE: YGE) ("Yingli Green Energy" or the "Company"), a leading solar energy company and the world's largest photovoltaic ("PV") manufacturer, which markets its products under the brand "Yingli Solar", today announced that its wholly-owned subsidiary, Yingli Energy (China) Company Limited ("Yingli China"), is now authorized to conduct in-house Underwriters Laboratories (UL) certification testing for solar modules. The participation in UL's Client Test Data Program (CTDP) further validates Yingli Green Energy's advanced quality control and product testing capabilities.

Yingli Green Energy's UL certification testing will now transpire at the Company's Baoding, China-based laboratory facilities, which significantly reduces the time required to bring new products to market. The Company obtained CTDP certification after passing a rigorous assessment by UL, who will thoroughly audit all test results, as well as reassess the management system of the Company's laboratory facilities on an annual basis to ensure the validity of the results.

"Obtaining UL's CTDP certification is representative of the Company's dedication to technology and product quality," said Dr. Dengyuan Song, Chief Technology Officer of Yingli Green Energy. "We are deeply committed to delivering high-quality solar modules that exceeds customer expectations, and our decision to participate in UL's CTDP program reflects that commitment."

"UL would like to congratulate Yingli Green Energy on achieving CTDP laboratory status, which will further facilitate market access of their products all over the world, especially in the Americas market where the UL label is highly respected and sought-after. This certification is an important demonstration of Yingli Green Energy's long-term commitment to quality," stated Evelyn M. Butler, Business Development Director, UL Energy & Industrial Systems business division.

About Yingli Green Energy

Yingli Green Energy Holding Company Limited (NYSE: YGE), which markets its products under the brand "Yingli Solar," is the world's largest photovoltaic module manufacturer. With 2,450MW of vertically-integrated annual production capacity, Yingli Green Energy's manufacturing covers the entire photovoltaic value chain, from the production of polysilicon through ingot casting and wafering, to solar cell production and module assembly. Headquartered in Baoding, China, Yingli Green Energy has more than 20 regional subsidiaries and branch offices and has distributed more than 6,000MW of PV modules to customers worldwide.

For more information please visit www.yinglisolar.com and join the conversation on Facebook, Twitter and Weibo.

About UL

UL is a premier global independent safety science company with more than 118 years of history. Employing more than 10,000 professionals with customers in over 100 countries, UL has five distinct business units ¨C Product Safety, Environment, Life & Health, Knowledge Services, and Verification Services ¨C to meet the expanding needs of our customers and to deliver on our public safety mission. For more information on UL's family of companies and network of 95 laboratory, testing, and certification facilities, go to UL.com.