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
Camellia oil is a sweet seasoning and cooking oil made by pressing the seeds of "C. oleifera", "C. japonica", and to a lesser extent other species such as "C. crapnelliana", "C. reticulata", "C. sasanqua" and "C. sinensis". Relatively little-known outside East Asia, it is the most important cooking oil for hundreds of millions of people, particularly in southern China. Camellia oil is commonly used to clean and protect the blades of cutting instruments. Camellia oil pressed from seeds of "C. japonica", also called tsubaki oil or tsubaki-abura (椿油) in Japanese, has been traditionally used in Japan for hair care. The camellia