Just get a health certificate with a red background photo. Only one inch bareheaded color photo is needed to apply for a health certificate, and there is no specific color. You need a physical examination before you apply for a health certificate. Take your ID card and two one-inch bareheaded color photos, get the physical examination form, pay the medical examination fee at the toll booth, and then post photos for a physical examination. Health certificate refers to the proof of preventive health examination, which proves that the examinee has the health quality required by the industry. Staff engaged in food, environment, schools and drug production and operation must undergo health examination every year.