How do I delete/close my Sina account?
If you want to delete your SINA Netizen account information and preferences.
You may access to to edit your SINA Netizen account information.
You may also delete your SINA Netizen account information and preferences by:
-Emailing your deletion request to SINA while your SINA login ID and password have been verified.
-Replying to the "Netizen welcome letter" with "Remove" in the subject line.
-Forwarding a copy of "Weekly Newsletter" to firstname.lastname@example.org with "Remove Account" in the subject line.