For example, the characteristics of China people's dietary customs, the differences between the eight major Chinese cuisines, the historical evolution and formation of "Sichuan cuisine", and the advantages and disadvantages of China people's dietary styles.

The topic can be big or small. These are all big topics, from small topics to the similarities and differences of each cooking method, and even the production technology, nutritional characteristics, color, fragrance and shape of each dish can be written.