Where can I get a health certificate for going abroad in Gansu Province?

If you are in Lanzhou or a city near Lanzhou, go to Gansu International Travel Health Center, No.387 Jiayuguan East Road, Lanzhou.

Besides Lanzhou, Jiuquan and Tianshui also seem to have international travel health centers. You can ask the entry-exit inspection and quarantine bureau over there for details.