The first reason is that the climate in Guangdong is actually quite hot. The latitude of Guangdong is relatively low in China, so the weather will be hot. Many provinces need to eat Chili because the weather in these provinces will be colder. At this time, they need to eat some peppers to keep out the cold, so that their bodies will not be so cold and will be warmer. However, if people in such hot weather in Guangdong are allowed to eat peppers, the anger of peppers will not be released, and the accumulated body will easily make people get angry. Therefore, Cantonese people generally don't like to eat Chili, because eating Chili on such a hot day is easy to get angry and bad for their health.
But in fact, why do Cantonese people often get angry when they don't eat Chili? This is related to herbal tea. In fact, Cantonese people don't always love fire, but we all know that Cantonese people like to drink herbal tea. Generally speaking, in other provinces, drinking herbal tea means that getting angry needs to reduce fire, but friends in Guangdong don't need it. One reason why they often drink herbal tea is to keep healthy. Guangdong people still pay great attention to health preservation, so good health is very important to them, so they will soak some plants to drink in summer, on the one hand, to reduce fire and prevent getting angry, on the other hand, it is good for their health.
Another reason why they often get angry may be that life pressure is relatively high, and it is easy to get angry in hot weather. Guangdong is a big province with many famous cities and a fast pace of life. Everyone is busy, and sometimes they get angry. It's easy to get angry under pressure.
These are my own opinions. If you have any other opinions, please feel free to communicate with me.