The essence of Mexican food lies in the use of fresh local ingredients and the cooking skills to cook the ingredients to the extreme. Mexican food usually uses a lot of ingredients such as peppers, beans, corn, tomatoes and onions, which can highlight the unique flavor and taste of Mexican food.

However, there may be many reasons why Mexican food is not popular in China. First of all, people's taste preferences in China are diverse, and people in different regions have different tastes in food. Secondly, the promotion and spread of Mexican food in China is relatively late. Before 1990s, few restaurants in China or abroad served Mexican food. In addition, food prices in Mexico are relatively high, which may cause certain economic pressure on consumers. Finally, there are some differences between China and Mexico in cultural background, historical origin and political relations, which may also have a certain impact on exchanges and cooperation between the two countries.

In short, the essence of Mexican food lies in the use of fresh and local ingredients, as well as the cooking skills to cook the ingredients to the extreme. Although it is not popular in China, with the deepening of exchanges and cooperation between China and Mexico, there may be more opportunities to taste this delicious food in the future.