I am a student of Guizhou University. I want to apply for a dietitian certificate, but I don't want to train. I want to teach myself. Which book should I buy? What are the application requirements? How to sign up? If you teach yourself before the exam, you may need a college or undergraduate degree in related majors (students can also do it). Basically, there are two books, namely "Public Nutritionist (National Vocational Qualification Training Textbook)" (this one seems to have three levels and four levels), and the other one is forgotten, but it is mainly to practice skills. Please consult the local vocational skills guidance center first and sign up for the exam there.