Betel nut was first introduced from India, and it became popular from the feudal dynasty hundreds of years ago to the Taigong dynasty. At that time, from the emperor to the common people, they were all keen on this. In the court, eat areca is an elegant activity, with all kinds of exquisite utensils and the post of "betel nut waiter" to serve princes and nobles and concubines eat areca. I feel a bit like rich people smoking cigars today. (Attachment)-Areca catechu, Areca catechu and Areca catechu are palm plants in English. In China, it mainly grows in Hainan, Taiwan Province Province and other tropical coastal areas. The seeds of betel nut have many names, such as kernel frequency and betel nut. Since ancient times, betel nut has been a good fruit for residents in the southeast coastal provinces of China to welcome guests and entertain relatives and friends. In ancient times, honored guests as "guests" and "lang", hence the name "betel nut". There are four levels of hospitality in Hainan: "tea, cigarettes, wine and betel nut". Betel nut will only be served on important festivals such as welcoming VIPs and weddings, which shows its status. At present, with the expansion of betel nut planting area and the love of more and more friends, betel nut has spread to people's daily consumption. Areca nut is also one of the four southern medicines in China. Areca nut contains many nutrients and beneficial substances needed by human body, such as fat, areca oil, alkaloids, catechins, choline and so on. Areca catechu has a unique function of preventing dysentery, which is the medicine fruit of doctors in past dynasties and is also known as "Xizudan". Because boils are generally related to irregular diet and qi stagnation, betel nut has been widely concerned for its medicinal properties because it can reduce qi, promote digestion and resolve phlegm. Even poets have a soft spot for betel nuts. Su Dongpo, one of the eight masters in the Tang and Song Dynasties, once wrote a famous sentence, "Red tides on the cheeks drunk betel nuts". Fresh betel nut has the wonderful effect that "hunger can make people full, and fullness can make people hungry". When eating on an empty stomach, it is full of qi and easy to digest after a meal, which can be described as a fairy fruit on earth. Li Shizhen, a medical scientist, recorded in Compendium of Materia Medica that Areca catechu has many diseases, such as "reducing edema, dredging joints, invigorating spleen and regulating middle energizer, and treating heartache". Not only that, betel nut also has the effect of treating glaucoma, hypertension and expelling insects. The history of chewing betel nut should be quite long. Su Dongpo, a great poet in the Song Dynasty, once said, "Red tides make betel nuts drunk". In the Ming Dynasty, Li Shizhen gave a detailed description of betel nut: "Betel nut is extremely unique among trees, the largest one has a degree, and the highest one is nine feet ... but it is not resistant to frost and cold, so it is not allowed to be planted in the north." Sex is not tolerant to frost and cold, and planting is not allowed in the north. So Hainan and Lingnan are the birthplaces of betel nut. There is also a record of "black country" in the ancient book Shan Hai Jing, that is, chewing betel nut for a long time will make people's teeth black, because the juice of betel nut is purple.