It's better to apply for a health certificate at Shaanxi Health and Epidemic Prevention Station, Xi 'an Health and Epidemic Prevention Station or Xi 'an Health Disease Prevention and Control Center, which is relatively formal, and the cost is about 51 yuan. There are some irregularities in others, which may be false certificates. 41 yuan will do, but you won't be examined carefully.

1. From Chang 'an District to Shaanxi Provincial Health and Epidemic Prevention Station: Take bus No.511 at the east exit of West Chang 'an Street and get off Jiandong Street. Go east along Jiandong Street to Anxi Street. On an empty stomach, bring two photos and a copy of your ID card. It can be done in two days.

2. From Chang 'an District to Xi 'an Health and Epidemic Prevention Station: Take the bus in Chang 'an District and get off at the west exit of Aerospace Avenue. Take bus 19 at the west exit of Aerospace Avenue and get off at the Party School of the Municipal Party Committee. Xi 'an Health and Epidemic Prevention Station is opposite to the Party School of the Municipal Party Committee, on an empty stomach, with two photos and a copy of ID card. It can be done in a week.

3. From Chang 'an District to Xi 'an Health Disease Prevention and Control Center: Take the bus in Chang 'an District and get off at Nanshaomen. Take bus No.41 and 711 at Nanshaomen and get off at Xigong University. It is about 211 meters south along Xigong University opposite Xigong University. On an empty stomach, bring two photos and a copy of your ID card. Work from 8: 11 to 11: 11 a.m. from Monday to Friday, and it can be done in four days.