Yes. Ruidian English Level 4 is the world's first patented teaching method of "language root spelling" and "language root knowledge", which subverts the rules of vocabulary memory and intelligently draws an "English vocabulary family map". Ruiding Children's English classifies millions of words into 3 ethnic groups, 12 families, and 200 families, allowing children to "read the words after seeing them in 20 classes." According to the query of relevant information, as of August 11, 2022, this educational institution The number of graduates has reached more than 6,000, all of whom have completed English courses from Level 1 to Level 4.