Yan Hui was one of Confucius' favorite students. He is one of the "four assesors" which have their altars to the east of Confucius in the Confucian temples in Qufu and Beijing. The temple to Yan Hui in Qufu was built during the Yuan dynasty.
If the temple of Confucius in Qufu looks shabby, the temple of Yan Hui appears to be falling apart. The halls and gates on the main north-south axis are surviving and must be receiving some minimal maintenance. The halls to the east and west sides were literally rotting away. The grounds were almost hopelessly overgrown with weeds and in one case the heavy wooden beams the support the roof were propped up with rusting metal bars because the wooden beams were rotted through. It was a pretty sad sight. Perhaps things are better now. The temple of the Duke of Zhou had obviously been renovated recently and was in quite good condition.