Guangdong lies in the south. According to the five elements theory of Chinese medicine, the south belongs to heat, which is similar to the warmth and inflammation of "fire", so the south belongs to fire. As far as climatic conditions are concerned, Guangdong is located in the subtropical zone and belongs to the coastal area. The climate is warm and humid, and the most common diseases are wet temperature and damp heat. In terms of eating habits, Cantonese people like to eat spicy, fat, sweet and strong flavors, as well as seafood, delicacies and game. Cooking methods include frying, frying, frying, stewing and baking. Cooking materials are mostly spicy and hot products such as ginger, garlic, onion, pepper, salt, lobster sauce, pepper and star anise, so the incidence of dry heat and wet stagnation is more common. Therefore, the habit of drinking herbal tea in Guangdong is very common.
Camellia oleifera has health care functions: it has many functions, such as appetizing, dispelling cold and avoiding obstacles, relieving exterior syndrome and stopping diarrhea, lowering blood sugar and blood fat. At present, Guanyang Camellia in Guilin, Gongcheng Camellia and Sanjiang Camellia in Liuzhou are famous for their unique historical, cultural and economic significance. Northern Guangxi, including Guilin, Liuzhou and Hezhou, is the birthplace of Camellia oleifera in northern Guangxi, so drink Camellia oleifera.