All right. Ruizhidian app has a wealth of learning courses, and audio, video and graphic courses are used as good teaching methods. "Ruizhidian app" is a very good online education and learning software. Committed to building an advanced and high-quality education service system, making learning convenient, having a perfect curriculum system, improving their own quality, practicing oral English, reviewing research, popular courses and so on. , audio+video+graphic.