5. How to use the email address bound to Apple ID (otherwise it will default to the email account used to send emails) for Apple Music student authentication and skip UNiDAYS authentication?

Actually, there are other ways to complete student certification: send an email to UNiDAYS. The recipient is help@myunidays.com, the subject of the email is student certification, and the text content is roughly:

Hello, I want to verify my student identity. The following are my materials, 1. Name 2. School name As well as the school’s official website 3, the college where you are located 4, and photos of the front and back of your student ID card (need to have an expiration date), otherwise you can choose a screenshot of the online verification report of student status on Xuexin.com (it is recommended to upload the verification report/photo of your student ID card as an attachment) 5. The email address bound to the Apple ID (otherwise it defaults to the email account used to send emails). After sending the authentication email, you will receive an email indicating successful authentication within one or two days at the latest. Then click "Listen to Music" and it will automatically jump to Apple Music. The subscription method can also be changed to student subscription.