Why are photos taken at an oblique angle of 45 degrees more beautiful?

The basic principle of mobile phone lens is wide-angle characteristic, which is mainly manifested as: strong close-range perspective, increased visual effect of eyes, longer and thinner face.

China people's eyes are high and their faces are thin, so this angle is more aesthetic.

This technique is also often used in artistic photography to make the subject's legs look slender, or to show the theme of the big tail of a wedding dress.