What happened after ming emporers disallowed foreign exploration?

Idk but i hope you figure it out : )

Ayoung lady whom i'll call anonymous lived in west berlin and she said there's a thing going on there called the berlin airlift.the russians are trying to take over. this is not a good thing she says because the russians are communist and in a communist society. you don't have a say in the vovernment and you have much room to stand up for yourself.