The ming government chose to adopt a policy of : Isolationism
The isolationism is some sort of ideology that make a country to distant itself from other country's affair.
This allow that country to focus more on taking care of their own people
The answer is STIGMA.
Hope this helps :)
Myanmar has a history of recent transgressions against human rights and democracy. For most of its independent development, it was ruled by a military junta. The laws make it hard or impossible for foreigners to do many things, such as own ground. If foreign investors would be approved in Myanmar (which is not at all certain), they would not be sure that their property in Myanmar would be respected and e.g. not confiscated (nationalized).