In order for the exiles to travel from the Bay of Pigs to Havana, they would have to travel North-West. Havana is located in the North-West of Cuba and the Bay of Pigs is located somewhat South-East of Havana. Therefore, the direction that the exiles would need to travel is North-West.
Because a command economy is being used in china and china's economy is going very well hence the question, Command economies have completely succeeded each time they have been used.