The methods of issuing electronic invoices by Kunming Airlines are as follows:

1. Open the official website of Kunming Airlines, or download and open the APP of Kunming Airlines.

2. click "order details" at the top of the page.

3. after entering the order details page, click "issue electronic invoice".

4. After entering the electronic invoice page, you will see detailed invoice information, including invoice number and other detailed information.

5. If you need to download the electronic invoice, you can click the "Download" or "Preview" button at the bottom of the page.

6. finally, after confirming that the information is correct, click the "confirm" button in the lower right corner of the page to complete the issuance of the electronic invoice.

the above steps are for reference only, and the specific operation steps may be slightly different due to different official websites or APP versions of Kunming Airlines. If in doubt, please consult the customer service staff of Kunming Airlines.