If there is no special requirement, it is generally an inch photo, that is, an inch bareheaded registered photo with a red background or a blue background.

I'd like to suggest to job seekers that since it's a photo on your resume, take a photo of yourself and be full of energy. Since there is such a rule in our job hunting environment that photos should be attached to resumes (it is generally unnecessary and impossible to attach photos to resumes abroad), let's leave a good first impression on HR.

As for what clothes to wear, do you mean when you take the registration photo or when you interview? If you are taking pictures, you can wear formal clothes or casual clothes, as long as you clean up and look energetic; If you're going for an interview, you'd better buy a neat suit. After all, formal dress is still a state.