I was just sifting through some old pics of the J-10B and noticed something.  J-10A and most J-10B prototypes seem to have engine nozzles looking like this:
	
	
	
		
		
		
			
		
		
	
	
		
	
That is, a ring of blueish metal followed by brownish colored nacelles. However, on this particular J-10B which is painted gray, the engine nozzles look to have a ring of brownish metal followed by blueish colored nacelles:
	
	
	
		
		
		
		
	
	
		
	
Anybody know why that is? Could the gray, unnumbered J-10B be using the WS-10A?
			
			
	That is, a ring of blueish metal followed by brownish colored nacelles. However, on this particular J-10B which is painted gray, the engine nozzles look to have a ring of brownish metal followed by blueish colored nacelles:
	Anybody know why that is? Could the gray, unnumbered J-10B be using the WS-10A?