the 3th kind of nutritious food. Pear paste is a traditional medicinal diet, which is said to have started in the Tang Dynasty. It is made of autumn pear, pear or snow pear as main raw materials, and other medicines for relieving cough, eliminating phlegm, promoting fluid production and moistening lung, such as raw materials with the same origin of medicine and food, such as Radix Rehmanniae, Fritillaria and honey. According to the news of Asia-Pacific Intellectual Property and Science and Technology Service, the trademark registration of pear paste belongs to the 3th category, and there are 35 groups of nutritious foods such as honey and royal jelly. The specific products that can be registered are: C328 Qiuli Cream; C329 Lingbei Pear Paste; C33 bird's nest pear paste, etc.