In this mobile learning era, to give instructors and learners more convenient learning tools, the Department of Overseas Chinese Education have developed and converted teaching materials into e-books and other forms of digital materials. Based on the CEFR, ACTFL, and TOCFL standards, these teaching materials are divided into six levels: Breakthrough (A1), Waystage (A2), Threshold (B1), Vantage (B2), Effective Operational Proficiency (C1), and Mastery (C2). Users can apply e-books on different digital platforms, read them online or download them, and click applicable e-books according to their mobile devices. Also, every e-book has incorporated basic functions such as bookmark, zoom in or out, remark, underline and eraser, etc. It makes user easier for self-learning and reviewing.