Mr. Zongwei Li has served as our independent director since November 2017. Mr. Li has served as a managing director of Sailing Capital, a private equity fund, since June 2014. He served as an executive director and chief financial officer of Yingli Green Energy Holding Company Limited, a photovoltaic manufacturer listed on the New York Stock Exchange, from 2006 to 2014. He served as a senior audit manager at Pricewaterhouse Coopers from 1995 to 2006. Prior to that, he served as a securities and futures trader at CITIC Securities from 1993 to 1995. Mr. Li is also currently an independent director and chairman of the audit committee of Yadea Group Holdings Ltd., an electric vehicle brand listed on the Hong Kong Stock Exchange. He also served as an independent director and chairman of the audit committee of Youku Tudou Inc., an Internet television company listed on the New York Stock Exchange from 2010 to 2016. Mr. Li received his MBA from Olin School of Business, Washington University in St. Louis in 2006 and his bachelor's degree in mechanical engineering from Shanghai Institute of Technology in 1993. Mr. Li is a certified member of China institute of Certified Public Accountants.