Why is Ruijin called rotten hall? What's under it?

Why is Ruijin called the restaurant under the rotten hall? The so-called rotten hall is a shabby ancestral hall, which has nothing to do with beef. Speaking of the beef shop under the rotten hall, many people must know it. The so-called rotten hall is a shabby ancestral hall, which has nothing to do with beef. Ruijin beef soup is first mixed with sweet potato powder and some ingredients, and then boiled in a traditional soup pot with fire. The cooked beef tastes smooth and tender, the soup is greasy and the taste is extremely delicious.