The "Three Treasures of Guangdong" refers to the three treasures of tangerine peel, salty olive and grass. First, wrap the salty olive with tangerine peel, then tie them up with grass, and spread them flat on the salted ground. In a glass vessel, put a layer of Guangdong Sambo and sprinkle a layer of salt, then seal it and place it in a cool place. It can be eaten after three years.

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Tangerine peel, orange peel, leaves, flowers, and seeds can be used as medicine and rubbed on the skin to have analgesic and anti-inflammatory effects, as well as beautification effects; it can be used for medicinal purposes. Among them, Xinhui tangerine peel is the most valuable.

Orange peel, also known as tangerine peel, tangerine peel, yellow orange peel, etc., is the peel of many kinds of oranges. The volatile oil contained in it can promote the increase of gastric juice secretion, accelerate gastrointestinal peristalsis, increase the secretion of respiratory mucosa, and facilitate the discharge of phlegm. Used for coughs with damp phlegm, cold phlegm, and spleen and stomach qi stagnation. Regulate qi and strengthen the spleen, dry dampness, resolve phlegm and relieve cough.

Orange flesh regulates qi and appetite, produces body fluids, relieves heat and thirst, prevents constipation, resolves phlegm and relieves cough.

After boiling and adding sugar, fresh orange peel can also be made into delicious jam.

Tangerine peel is the mature fruit of various tangerine species such as Rutaceae plants such as Lucky orange or Zhu orange. Produced in Guangdong, Fujian, Anhui, Hubei, Sichuan and other places in China. Oranges are called tangerines in southern China and are famous products in Guangdong, such as Chaozhou tangerines and Xinhui tangerines. Harvested in autumn and winter.