Bonnie Yi Zhang has served as our independent director since IPO. Ms. Zhang is the chief financial officer of Sina Corporation, a Nasdaq-listed online media company in China. Ms. Zhang has served as independent director of Dada Nexus Limited, a Nasdaq-listed local on-demand retail and delivery platform in China, since June 2020. From March 2014 to March 2015, Ms. Zhang served as the chief financial officer of Weibo Corporation, a Nasdaq-listed social media platform in China and one of Sina Corporation's subsidiaries. Before joining Weibo, Ms. Zhang was the chief financial officer of AdChina Ltd., an integrated internet advertising platform in China, from May 2011 to February 2014. Prior to that, Ms. Zhang was an audit partner of Deloitte Touche Tohmatsu based in Shanghai, with a focus on serving Chinese companies making initial public offerings in the United States and Chinese companies listed in the United States, from October 2007 to April 2011. Ms. Zhang served as a senior manager in the National Office SEC Services group of Deloitte & Touche, LLP from May 2005 to August 2007, where she was responsible for pre-issuance reviews of securities offering documents and periodic reports to be filed with the SEC with a focus on foreign private issuers. Ms. Zhang received a bachelor's degree in business administration from McDaniel College. Ms. Zhang is a certified public accountant in the State of Maryland and is a member of the American Institution of Certified Public Accountants.