The situation where a person with hepatitis B virus can apply for a health certificate is when the liver function is normal and the condition is stable. The situation that cannot apply for a health certificate is that the liver function is not normal, and such patients need to be treated. Hepatitis B virus carriers can not be engaged in: a. can not be engaged in drinking water, diet, cosmetic surgery, childcare and other occupations; b. can not be engaged in contact with directly imported food; c. can not be engaged in the production of cosmetics; d. can not be engaged in public places for customer service occupations; e. can not be engaged in preschool education, navigation technology, flight technology, pastry craft, western food craft, cooking and nutritional cooking craft, the Food science and engineering, clinical medicine and other related occupations.