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 from Taiwan Province Province to Hainan Province and Guangxi, Guangdong, Fujian and other places 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". Pitaya, also known as dragon fruit and red dragon fruit, is named because its fleshy scales look like the outside of a dragon.