According to the online search onion math member account password daquan. But you can ask the teacher for it. As long as the college teacher provides you with an account number and password, it will definitely be free.

Different from the regular online courses, Onion College abandoned the real teacher's teaching from the beginning of its establishment. According to the national curriculum standards and teaching materials, more than 3,500 creative animation video courses have been independently developed in the past seven years. Each class takes an average of 5-8 minutes to explain a knowledge point or thinking point to help students understand it in depth.