There are two types of honey: mild and cool. For example, jujube honey, litchi honey and longan honey belong to the honey with flat and warm nature, while acacia honey, Vitex negundo, linden honey honey and Chinese milk vetch honey belong to the honey varieties with flat and cold nature.

nectar is a liquid secreted by nectaries of plants, which tastes sweet and is an aqueous solution of sugar. Nectar is one of the most important rewards provided by plants to flower visitors, and it is also an important trait that affects the behavior of flower visitors. Bees collect nectar and brew it into honey.

Nectar contains chemical components such as sugars, amino acids, protein, inorganic ions, lipids, phenols, alkaloids and terpenoids, but it can be regarded as an aqueous solution of sugars.