It depends on sea transport for more than 99 % of its imports and exports. In particular, its economy depends on petroleum imported from the Middle East, North Africa, England, and Indonesia. If the PRC adopted a long-distance blockade, it could intercept oil tankers headed for the ROC in the South China Sea. If petroleum shipments did not arrive in a timely fashion, Taiwan would quickly be paralyzed.
就地緣戰略而言，台灣為海島型國家，進出口原料、貨物百分之九十九以上仰賴海域運輸，尤其是經濟命脈所繫的原油大多由中東、北非、英國、印尼等地進口，所以中共若採遠距長程的封鎖方式，在南中國海攔截我方油輪，原油不能即時運補，台灣將很快癱瘓。