There are 4 ways you can renew your 邮政信箱: Online with a credit or debit card. Go to http://po盒子.weichuchuang.com/manageAccount.html 并点击 更新 which will take you to "管理邮箱" page. Then click 更新邮箱. This feature is available 30 days before your next payment is due. At a Self-Service Kiosk. 找一个售货亭. 邮寄续期. 发送 a check or money order payable to "U.S. Postal Service to the Postmaster where your 邮政信箱 is located. (Include your 邮政信箱 number on the memo line of the check.) Visit the Post Office where your box is located. Pay by cash, check, or credit card.