1. First, open the website of Yunnan Electronic Taxation Bureau, log in to the main interface of the invoicing system, enter the commodity code management interface, click "Add" to open the interface of adding commodity codes, and click "Confirm".

2. Secondly, add the entered commodity code information to the code base, select the tax classification code, and select the tax rate or collection rate, rule model, unit of measurement and unit price according to the actual situation.

3. Finally, click the Save button to save the product information.