Why did Nationalists under Chiang Kai-shek come to Taiwan in 1949? to drive out Communists to flee China and Communist rule

Its led to migrationits led to death 

No map. ie where is the map as this question cannot he answered without a map so the question as is is irrelevant and i am disappointed as i am a geologist.

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.