Which is better in online chess class?

There is an excellent class. There is an online chess course launched by a boutique course, and there are reliable teachers. The person in charge of teaching and research studied in Peking University with a bachelor's degree and Cambridge with a master's degree, and he is proficient in chess. The teaching and research teachers and lecturers of Youdao Children's Chess Academy are all coaches certified by the Chess Federation and have rich competition experience.