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How Can We Avoid Rush Hours
			Rush hour is an annoying thing when you use transportation systems, 
especially in Seoul.
		
		
		
		
		
		
	 
	
		
		
			
			 
			
			
			
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The Oldest Subway Station in Seoul
			Subways have been running in Seoul's underground since 1974. 
Then, where is the oldest subway station?