The size requirements of electronic materials uploaded in the attachment of certification materials.

There are four requirements for the size of the uploaded electronic version in the attachment of the certification materials.

1. Picture size: The height of the picture should be between 100 and 640 pixels, the width should be between 90 and 480 pixels, and the width must be less than the height.

2. File size: The maximum photo file is 40kb, which cannot be 0kb or an empty file that cannot be opened.

3. file format: jpg.

4. The background color of the photo should not be larger than the avatar, and it should not be a whiteboard without the avatar or other solid colors. The photo should be clear and identifiable. Photos that are too blurred can't be reported successfully.