Guangdong cuisine, as one of the eight major cuisines in China, has a unique food culture, but there may be the following reasons why it can't be served in the state banquet:

1. Differences in food culture: the state banquet is usually designed by the host country according to its own culture, tradition and taste, while Guangdong cuisine has a wide audience in southern China, but its unique taste and cooking method may not be suitable for everyone's taste. Therefore, in a formal occasion like a state banquet, considering the diversity and cultural background of the people attending the banquet, it is more appropriate to choose a more universal and acceptable cuisine.

2. ingredients and cooking difficulty: cantonese cuisine pays attention to the freshness and quality of ingredients, and has higher requirements on cooking skills and cooking skills. In such a large-scale and high-standard activity as a state banquet, it may be difficult to meet the requirements of Cantonese cuisine for ingredients and cooking conditions. In contrast, other cuisines such as Huaiyang Cuisine may pay more attention to the diversity of ingredients, the simplicity of cooking and the stability of quality.

3. Dietary preference and historical background: The choice of dishes for state banquets is also influenced by the dietary preference and historical background of the host country or organizer. For example, when holding a state banquet in France, traditional French dishes such as French thick soup are usually provided; American state banquets tend to choose American dishes. This choice is also related to the historical, cultural and political relations between the two countries.

4. Cultural inheritance and innovation: Although Cantonese cuisine has not been selected as the main course of the state banquet, it does not mean that its status is unimportant or unpopular. In fact, Cantonese cuisine has a wide influence in the world and is one of the important representatives of Chinese food culture. On the basis of inheriting and carrying forward traditional Cantonese cuisine, continuous innovation and integration is also an important direction for the sustainable development of Cantonese cuisine culture.

In a word, the choice of dishes for a state banquet is a comprehensive consideration, involving many factors such as culture, history, cooking skills and the tastes of people attending the banquet. Although Cantonese cuisine is not the main cuisine in state banquets, its important position and international influence in Chinese food culture are still worthy of attention and promotion.