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Why can't self-study pens be free?
Because the platform needs to be profitable, some products are charged.

The self-taught examination paper bank client is an online classroom app for self-taught students. It has a huge real question bank, with millions of real questions waiting for you to practice, and a super real simulation question bank is open for you. It is a question bank software specially designed for self-taught students, developed by Shenzhen Biguo Education Technology Co., Ltd., and the question bank contains undergraduate majors of self-taught colleges in all provinces except Macau, Taiwan Province and Hongkong. The software is divided into normal training, real-life training and simulation training, and helps self-taught students pass the self-taught exam by brushing questions.

Every study material and tool can be used free of charge and carefully prepared for students; Live courses can help students learn knowledge more intuitively and carefully, and explain it more carefully; Of course, every live broadcast will inform the time and content of the live broadcast in advance; Online learning, video courses, can open the software to learn anytime and anywhere, very simple; Online practice, if you finish learning for a period of time, you can consolidate your knowledge; Brand-new steganography questions, wait until the sprint stage to practice the latest steganography questions.