What methods can be used to investigate the tea-fruit cultural snacks in Song Dynasty?

In terms of tea and food. In the early Song Dynasty, in addition to tea, fruit (now dessert) was also the protagonist in tea food. Fruit, the full name of "tea fruit", originated in the Tang Dynasty and has a history of 1400 years. Tea drinking prevailed in the Tang Dynasty, and the habit of eating tea (dessert) while drinking tea appeared. Fruit is a snack eaten with tea at a tea party. With the prosperity of economy and culture, the development of cooking methods and sugar-making technology, most people in Song Dynasty were no longer satisfied with hunger, but had more sophisticated and diverse needs.