Go to "Account Settings" in the login account section and click "Change login email". After entering the new email address and your current password, submit the form. Three things will happen: 1. A confirmation email will be sent to the new mailbox. The change takes effect after clicking the link in that email. The link is valid for 24 hours. 2. A notification email is simultaneously sent to your current (old) mailbox, informing you that someone has applied to change your login email to a particular address. 3. The screen will display "Waiting for ○○ to confirm". You can resend the confirmation email or cancel directly. The requirement to enter your current password is to confirm that you are the one making the request. Your login email is your account ID. Changing it is like changing the key. If someone operates your computer while you are away, they cannot change it without the password. After the change takes effect, other devices will need to log in again with the new email.