It is the highest level. According to relevant data, Helen Dolan is the largest brand of children's English in Europe, which belongs to high-end in the early education industry in Europe. Helen Dolan Growth Center is a global high-end training institution, established in 1985, covering more than 40 countries around the world, with more than 1000 learning centers. It advocates all child-centered classroom teaching concepts and adopts real mother tongue teaching methods to provide professional teaching services for more than 3 million children around the world.