Lei Sun has been our chairman of the board of directors since November 2017. Mr. Sun has over fifteen years of experience in financial services industry and is a recipient of numerous prestigious national awards. Prior to founding our company in August 2006, Mr. Sun was a senior manager at the head office of China Minsheng Bank (HKEX: 1988) from September 2005 to August 2006. From August 2005 to September 2005, Mr. Sun served as a department head with Digital China Group Co., Ltd. (SZ: 000034) in charge of the development of internet financing products. Prior to that, Mr. Sun served as a director of banking service department with Taihe Chengxin Investment Co., Ltd. from August 2004. From March 2003 to August 2004, Mr. Sun served as the department head of financial services department of Hi Sun Technology (China) Limited (HKEX: 0818). Mr. Sun received his bachelor's degree in finance and EMBA from Peking University in 2003 and 2013, respectively.
Yanjun Lin joined us in April 2015, and has been our chief financial officer since April 2016, chief executive officer of 9F Primasia Securities since August 2016, and chief executive officer of our international businesses since September 2017, and our director since November 2017. Mr. Lin has worked in the banking and finance industry for more than 15 years. Mr. Lin has been serving as an independent non-executive director of Bank of Jinzhou Co., Ltd. (HKEX: 0416) since January 2017. Mr. Lin served as the director of Barclays Capital Asia Limited from August 2012 to April 2015. Prior to that, Mr. Lin served as an associate, vice president and director at Credit Suisse (Hong Kong)Limited from June 2008 to August 2012. Mr. Lin was an investment banker with BOC International Holdings Limited, Cazenove (Asia) Limited and Bear Stearns Asia Limited before joining Credit Suisse (Hong Kong) Limited. Mr. Lin also currently serves as the director of Asian Youth Orchestra, the director of Smart Finance Research Center of Financial Science and Technology Institute at Tsinghua University, the deputy secretary general of the Union of Finance Alumni of Peking University, and is a Fellow of Aspen Institute's China Fellowship Program. Mr. Lin received his bachelor's degree in money and banking from Peking University in 2001 and is an EMBA candidate of PBC School of Finance of Tsinghua University.
Lei Liu is our co-founder and has been serving as director since 2019, and our chief risk officer since June 2020 and our chief executive officer since August 2020. Prior to founding our business, Mr. Liu worked as the senior product manager of the retail banking department of the head office of China Minsheng Bank (HKEX: 1988) from 2006 through 2007, responsible for developing personal loan products. Prior to that, Mr. Liu served as a supervisor of personal finance business with the Shenzhen branch of China Minsheng Bank, responsible for business development and product design since 2003. Mr. Liu received his bachelor's degree in economics from Shanghai University of Finance and Economics in 2003, and his EMBA degree from Peking University in 2018.