Cinnamomum cassia United Kingdom, and India is Chinese cinnamon. "Indonesian cinnamon" ("C. burmannii") is sold in much smaller amounts. Chinese cassia is produced in both China and Vietnam. Until the 1960s, Vietnam was the world's most important producer of Saigon cinnamon, which has a higher oil content , and consequently has a stronger flavor. Because of the disruption caused by the Vietnam War, however, production of Indonesian cassia in the highlands of the Indonesia island of Sumatra was increased to meet demand. Indonesian cassia has the lowest oil content of the three types of cassia, so commands the lowest price. Chinese cassia
Cassia wine is also a traditional gift for birthdays in China. It is also considered a medicinal wine in traditional Chinese medicine. Li Shizhen's "Compendium of" Materia Medica credits sweet osmanthus with "curing the hundred diseases" and "raising the spirit". Within China, cassia wine is associated with Xi'an and Guizhou, but production now occurs throughout China, including Beijing and at the Hong Jiang Winery in Hunan. Despite the name, the Chinese cassia tree is not used to flavor cassia wine. References to the osmanthus in Chinese literature and poetry are often translated as "cassia" because both trees were formerly known in China