Bombax ceiba, also known as Panzhihua, red cotton tree or hero tree, kapok tree aliases: hero tree (Guangdong), Morian, red jasmine (Chaoshan), Morian flower,, Cottonwood, panzhihua, and zebra are a large deciduous tree growing in tropical and subtropical areas, with a height of 10-20 meters. Kapok tree is a deciduous tree of the Kapok family. It is native to India and widely distributed in tropical areas. It was introduced and widely cultivated in Taiwan in 1645. The upright trunk of kapok is densely covered with thorns, which are not sharp. The branches are whorled and elongate horizontally in all directions. Palmately compound leaves with 5 to 7 leaflets. The color of kapok is quite consistent. In early spring in February or March, the bleak dead branches first bloom with fiery red, and then new buds sprout. After the kapok tree blooms, it grows an oblong capsule. When mature, the pods crack and the cotton wadding in the fruit falls off in the wind. Blossoming cotton wool floats in the air, like snow in June, which has a special interest. Kapok batting has a soft texture and can be used to wadding mattresses. It was an important clothing material in ancient China. Generally, there is a black seed hidden in the cotton ball. The cotton ball rolls with the wind. When it encounters moist soil, it absorbs water and takes root. The base of the trunk is densely covered with knobs and spines to prevent the invasion of animals. The branches are whorled and the leaves are alternate. Although the trunk of kapok is thick, the wood is too soft, so it is of little use. The tree's origin is unknown, but it likely originated in India. It was widely planted in the Malay Peninsula, Indonesia, South China, Hong Kong and Taiwan with immigrants. According to ancient Chinese records, the Nanyue King Zhao Tuo presented a kapok tree to the Han Dynasty in the 2nd century BC. Cotton wool blooms first from February to March every year and then leaves. The five-petaled corolla, orange or orange-red, usually grows in early spring, earlier than the leaves. Calyx is dark brown, leathery. After flowering, oval-shaped fruits will form. Around May, the fruits will split open, and the oval seeds inside along with the white cotton wool will scatter in the wind. Since cotton does not grow in South China, local residents have collected cotton wadding when it floats and used it as filling material for cotton-padded jackets. Kapok can also be used as medicine. The fresh fallen kapok is dried in the sun. The dried kapok has medicinal value. It can detoxify, clear away heat, dispel cold and remove dampness. Use dried kapok to cook porridge or soup. Kapok seeds with tenacious vitality. Even in extremely harsh living environments, they can still sprout and grow. Cultural meaning: The kapok tree is the city flower of Guangzhou and Kaohsiung. Because of its tall and strong tree, it is compared with heroes in South China. Luo Man, the late Hong Kong pop music icon, had a song called "Red Cotton", which uses the kapok tree as a metaphor for the pride of the Chinese people. In addition, it is also the county tree of Kinmen County, symbolizing the local people’s perseverance and bright future development. In addition, there is also a Cotton Tree Drive in Admiralty on Hong Kong Island. The Cotton Tree Drive Marriage Registry located in Hong Kong Park is also a popular place for Hong Kong people to get married. Add another city that uses it as its city flower: Panzhihua City, Sichuan Province.