zī zī bù juàn 
		lit. diligent and never slacking (idiom); continuous concentrated effort
assiduous (in study)
to concentrate
		 
		
		
														
		
		
			 
		
				
		
			bù juàn 
		tireless
untiring
indefatigable
		 
		
		
														
		
		
			 
		
				
		
			huì rén bù juàn 
		instructing with tireless zeal (idiom, from Analects)
		 
		
		
														
		
		
					
				
		
			xué ér bù yàn , huì rén bù juàn 
		study tirelessly, teach with endless enthusiasm (idiom, from Analects)