The resignation of search engine Baidu.com's chief technology officer saw the shares in the company fall 4%, the South China Morning Post reported. Even though Baidu said that Jerry Liu, who has been with the company since it began, was unlikely to start a rival firm, it was unable to prevent a 3.6% drop in its NASDAQ share price. Liu's resignation, effective on December 19, is said to be for personal reasons. Liu was Baidu's first employee and served as vice-president of engineering from January 2000 before shifting over to fill the chief technical officer role earlier this year. His responsibilities include overseeing engineering teams and search R&D in Chinese.