Dim sum various mixtures of flowers with green tea, black tea or oolong tea. Flowers used include jasmine, gardenia, magnolia, grapefruit flower, sweet-scented osmanthus and rose. There are strict rules about the proportion of flowers to tea. Jasmine tea is the most popular type of scented tea, and is often the most popular type of tea served at yum cha establishments. The above teas are produced in most of China. Chinese tea bushes ("Camellia sinensis") are cultivated in the mountain areas of tropical and subtropical regions or wherever there is a proper climate, sufficient humidity, adequate sunshine and fertile soil. Chinese tea
Taiwanese tea sought profit in developing an alternative tea product on the island. Pouchong oolong was considered to be more flowery than Baihao Oolong, Pouchong was exported under the name "Formosa Pouching". In fact, Dongding Oolong (), White Tip Oolong () and Baochong Oolong (), Alpine or High Mountain Oolong, are all categorized as Oolong tea, which contributes a large part of Taiwan tea industry. Oolong tea was practically synonymous with Taiwanese tea in the late 19th century, and competitors in Ceylon sought a US market advantage by publishing materials emphasizing the use of human foot trampling during its production. This was