What exactly is the flower name of the Happiness Tree?

Alternative names for the Happiness Tree
Snake Tree, Bean-pod Tree, Jieguliangsan, Niuwei Tree, Chaoyang Flower, Mountain Radermachera, Kulingjiu (Taiwan, China), Xiaoye Niuweilian, Gelu (Hainan Island), Shezai Tree, Honghua Mu (Guangdong and Guangxi Trees and Shrubs Directory), Niuwei Tree (Dendrology Volume 2), Jiangdou Tree (Funing, Yunnan), Lazhao Tree (Hekou, Yunnan), Senmu Liangsan, Niuwei Mu (Guangxi Practical Chinese Herbal Medicine), Doujiao Mu, Niuwei Dou, Shezai Dou, Da Chaoyang (Guangxi Chinese Veterinary Medicinal Plants), Diesimao Tree (Hainan) Lübao (Shijiazhuang, Hebei)
Morphological characteristics of the Happiness Tree
The Happiness Tree is a medium-sized deciduous tree with pinnately compound leaves arranged alternately. The flowers open at night, with upright inflorescences, white to pale yellow, with rounded, wrinkled lobes. The capsule is leathery, cylindrical and strip-shaped, resembling a bean pod.
Ecological habits of the Happiness Tree
Radermachera sinica is native to Taiwan, China, Guangdong, Hainan, Guangxi, Guizhou, Yunnan and other places, mostly distributed in valleys and open forests on flat land at altitudes of 300 m to 850 m (Guangxi, Hainan) and 1,100 m to 1,700 m (central Yunnan and southward). It is also distributed in India, the Philippines, Bhutan and other countries. It prefers a hot, humid environment with plenty of sunlight. It tolerates high temperatures but fears cold, prefers moisture and dislikes dryness. For cultivation, use loose, fertile, well-drained loam and sandy loam rich in organic matter.
The flowering period is from May to September, and the fruiting period is from October to December.
Flower language of the Happiness Tree
Happiness, peace.