Its main contents are generally pig bones (chicken or duck) and seasonal vegetables. But the content is not fixed, and the original soup is made of leftovers from cooking.
Example soup is generally very thin, only salt is added, and the original flavor is pursued. Because of the simple raw materials, convenient sources and low prices, most soup samples are from free goods.
But with the development of catering industry, the content and quality of sample soup have been greatly improved. So now most soups are charged.
For example, it is provided every day!