2. Efficacy and function of sweet potato; Invigorating qi and blood: If you eat sweet potatoes often, your skin will gradually become moist and your complexion will become rosy. Its function of invigorating qi and blood can be compared with jujube, and it is not easy to get damp heat. Improve immunity: It contains more antioxidants than ordinary vegetables, which can prevent colds and improve immunity. Two-way regulation of intestinal function: people with constipation can often eat boiled sweet potatoes to promote gastrointestinal peristalsis and laxative; People with poor spleen and stomach and frequent diarrhea can eat baked sweet potatoes to relieve discomfort and strengthen intestinal function.

3. Sweet potato, also known as Dayehong, has big leaves, and with red skins and hearts, it is called Dayehong, and some of them are directly called Dayehong or "Dafang" in Minnan dialect, which is a local name in Zhangpu, Zhangzhou, Fujian, and is very vivid. Not all the leaves of this sweet potato are big (some leaves are big and some are small), and compared with other varieties, the leaves are bigger as a whole; Under the condition of abundant fertilizer and sunshine, the maximum vertical and horizontal side distance of leaves can reach 15-18cm.