When I was growing up, most citizens living under the socialist republic were not allowed to visit abroad, immigrate, or emigrate. The borders were shut tightly, holding everyone inside like a giant maximum-security prison controlled by the Communist Party and its dear leader.
The government had an anti-emigration policy, immigration was suppressed, and travel abroad was tightly controlled and only allowed to those who had a clean record, deemed so by the Communist Party who investigated a person's lineage, political activity, land ownership, real estate, and private property. Emigration, the actual moving and settling permanently in another country was highly discouraged and so was immigration, the temporary movement of people from one country to another.