How to fill in the ID code on the DRC visa?

The z code on the visa to the Democratic Republic of the Congo is COD-3. The materials required for the visa application for the Democratic Republic of the Congo: 1. Passport (valid for at least 6 months); 2. 2 passport photos; 3. Invitation letter , must be notarized by the local notary office in Congo; 4. Round-trip air ticket order and hotel order; 5. Application form filled in French; 6. Tourist visa also needs to provide proof of financial guarantee; 7. Work visa also needs to provide legal work permit and Business license, international epidemic vaccination certificate, etc.; 8. To apply for short-term residence, you can apply for one or more extensions with your application letter at the General Administration of Immigration of the Republic of Congo with your application letter within the validity period of the tourist visa; 9. To apply for long-term residence, you must apply within the validity period of the tourist visa. Complete the nationality certificate, work contract, official letter from the employer and work permit, etc., and apply for a work visa at the General Immigration Bureau of the Republic of Congo; 10. For a transit visa, you need to provide a connecting air ticket and a visa for the country you are going to.