Woongjin Thinkbig, integrates online and offline education with print publications. Woongjin PassOne was established in January 2007 via the M&A of three companies; Hangyo Gosi Academy, G-Cast and Saerom Publications, which has the highest lebel of competiveness in Civil Service Examination and Authorized Certificate Exam preparation for adults. Hangyo Gosi Academy is a professional institute which lines up the best lecturers in Korea, offering courses for various levels/series and improves the learning effectiveness of examinees through a profound consulting system and group study. G-Cast provides a video lecture service of famous instructors with a customized course available for beginners through professionals. In addition, online consulting, 24/7 remote support service and online examination are used increase the effectiveness of learning online. Saerom Publication has published 300 civil service related books, including Jaejeong Kuke and Minju Kuksa, the bestseller of civil service exam preparation books.