Salty food is a traditional name of Han nationality in northern China, which is widely spread in some districts and counties of Shandong and Hebei. Some places are called "collapse paste", some places are called "noodles support", and some people write "idle food". There is a custom of "entertaining children and spreading salt" in some parts of northern China. The so-called "entertaining grandpa to pass on salty food" does not mean that only grandpa can eat salty food, but only that grandpa enjoys the treatment of distinguished guests. Because only my uncle is a distinguished guest in the eyes of my mother-in-law, it is not easy to get white flour, eggs and oil when living conditions are not plentiful, so it is not easy to take out eggs, white flour and oil to entertain distinguished guests, which shows my mother-in-law's enthusiasm and sincerity for my uncle.