Sī mǎ Zhāo zhī xīn lù rén suǒ zhī 
		Sima Zhao's stratagem is obvious to everyone
fig. an open secret
		 
		
		
														
		
		
			 
		
				
		
			Sī mǎ Zhāo 
		Sima Zhao (211-265), military general and statesman of Cao Wei 曹魏[Cao2 Wei4]
		 
		
		
														
		
		
			 
		
				
		
			Sī mǎ Zhāo zhī xīn lù rén jiē zhī 
		lit. Sima Zhao's intentions are obvious to everyone (idiom)
fig. an open secret