To share materials on the 1688 website, you need to set sharing permissions first. The specific steps are as follows:

1. Log in to your 1688 account and enter the backend management center.

2. Click "Material Management" on the left and select "My Sharing".

3. Click the "Set Permissions" button and select the type of permissions you need to share, such as public sharing, link sharing, password sharing, etc.

4. In the permission setting page, enter the title, description and other information of the shared content.

5. In the "Upload Materials" page, you can choose to upload local files or select files from the cloud disk.

6. After uploading, find the material you want to share on the "Material Management" page, click the "Share" button, and share it to the specified user according to the set permissions.

7. Finally, the shared users can access the materials you shared through links or passwords.