The express amount of Postal Savings Bank refers to the corresponding expenses deducted by Postal Savings Bank through various express payment methods, including Alipay Express Payment and Tenpay Express Payment. The specific steps for Alipay to cancel the express payment of Postal Savings Bank are as follows:

1. Check Alipay official website on the webpage and log in to Alipay account. There is an account management next to my Alipay. In account management, click account assets, find the account link in the asset overview of account assets, and click the "Account Link" function.

2. Click the account link, find the option of Postal Savings Bank in my bank card, and click "Manage" behind the quick payment.

3. Find the bank card option in the account management column, find "Quick Pay" on the back of the bank card, find the "Close" button on the back of the quick pay and click Close.

4. After clicking Close, the following screen will appear on the page. You can choose different reasons for closing Express Payment according to your personal reasons, and then click Next.

5. Finally, enter the Alipay payment password of the corresponding account and click "OK" to cancel the quick payment function of the savings card.