There is no specific regulation on whether the university photo is on a red background and a blue background, depending on the requirements of the university. Red background is widely used, and blue background is generally used for postgraduate entrance examination. Extended information photos are photos used to prove identity on various certificates. The ID photo requires a bareheaded (hat-less) front photo. The background color of the photo is mostly red, blue and white, and the size is mostly one inch or two inches.