Pitaya huǒ lóng guǒ, whose real name is Qinglong Fruit and Honglongguo. Native to tropical Central America. Pitaya is rich in nutrition and unique in function. It contains plant albumin and anthocyanins, and is rich in vitamins and water-soluble dietary fiber, which are rare in general plants. Pitaya is a triangular column plant of cactus, which is native to tropical desert areas of Central America such as Brazil and Mexico, and is a typical tropical plant. Pitaya is a plant introduced from Nanyang to Taiwan Province Province, and then improved and introduced from Taiwan Province Province to Hainan Province and Guangxi and Guangdong in the southern mainland. Pitaya is named after its fleshy scales resemble those of dragons. When her bright and huge flowers bloom, the fragrance is overflowing, and potted viewing makes people feel auspicious, so it is also called "auspicious fruit".

The unique mucus of pitaya's branches and flowers, because of its extremely low osmotic pressure, contains a lot of nutrients and therapeutic substances, and has remarkable curative effect. Pitaya has the functions of preventing constipation, promoting eye health care, increasing bone density, helping cell membrane formation, preventing anemia and neuritis, angular stomatitis, reducing cholesterol, whitening skin, preventing dark spots, relieving heavy metal poisoning, resisting free radicals, preventing senile diseases, losing weight and preventing colorectal cancer. The latest research results show that the juice of pitaya fruit and stem has a positive effect on tumor growth, virus and immune response inhibition.