It may be caused by incorrect operation method. You can refer to the following method to deal with it; take the operation of Android mobile phone as an example:

1. Open WeChat and find "Sinopec Sales Co., Ltd. Zhejiang Petroleum Branch" , the bottom menu switches to the My Invoice option.

2. After entering the My Invoice interface, click on the electronic invoice below.

3. Next, select the month of refueling at the bottom, and then click the refueling electronic invoice above.

4. At this time, the specific refueling time and refueling amount of the month will pop up, and click on the back to select invoicing.

5. At this time, the data will be displayed in the invoicing amount above, then click below to select the invoice header.

6. If you have entered information and issued an invoice before, at this time, the invoice content, amount, buyer's name, tax number and other information will be displayed. Just click to get the electronic invoice immediately.

7. If this is the first time to issue an invoice, or if you want to change the invoicing unit, you can click + New Name on the lower right to add it.

8. Then click "Get electronic invoice now" here. The system will give you a link. After entering your mobile phone number, click to send the text message.

9. The system will notify you that a text message has been sent to this mobile number. There will also be a prompt in the upper left corner "If you want to reimburse, please print it yourself."

10. At this time, the mobile phone will receive a text message with a link address in pdf format.

11. Finally, we can copy and paste and send it to QQ, and then open it on the computer. An electronic invoice will appear. Click on the download in the upper right corner or print it directly.