1. Open WeChat and enter the "Me" page.

2. Find the "Invoice" option in the "Wallet" at the bottom of the "Me" page and click Enter.

3. On the invoice page, click "Problem History" in the upper right corner.

4. On the "Issue History" page, find the electronic invoice of Weifang Maintenance Fund that needs to be queried, and click "View".

5. On the "View Invoice" page, you can view the detailed information of electronic invoice, including invoice header, buyer, seller, commodity details, etc.