Jack Ma founded Alibaba in 1999 in his apartment with 17 friends after quitting his job as an English lecturer. He started with an investment of $20,000 to create China's Yellow Pages website, which grew to $800,000 in revenue within three years. Alibaba has since become one of the most valuable tech companies in the world, handling $170 billion in sales in 2012 alone. Though he faced early struggles like failing college entrance exams twice, Ma's persistence led him to learn English and eventually found the highly successful Alibaba Group.