1. You can bring your ID card and register with your mobile phone in the business hall of the corresponding mobile, Unicom or telecom offline entity, and then make it clear to the staff that you need to reissue your mobile phone card.
2. Contact customer service: If you try to retrieve your account or password, but still can't log in, you can try to contact the customer service department of Yunjiaoke Training System to provide complete personal information and relevant certificates to help customer service solve the problem.