According to the query of Youdao Education official website, Hi Learning online education is a formal institution. Being affiliated with Suntech, it is a long-distance extension of Suntech's institutional education. Xue Hai. Com's educational network is spread all over the country, with more than 200,000 trainees, nearly 7 times ahead of the second place in the same field, and its market share exceeds 50%. It is one of the largest distance vocational education institutions in China.