Is a political review required to enter Gansu Province’s public aviation brigade?

No need. Only government agency control requires political review. Gansu Provincial Public Aviation Brigade does not belong to the government agency category. Different institutions will have different requirements, and government agencies usually require political review. Schools and hospitals don't need it. Political review is actually a political review, which mainly checks whether there are any records of being anti-party, anti-social, or subject to criminal punishment in the files.