Li Shizhen is a famous Chinese herbalist from the Ming Dynasty, known for his comprehensive medical text 'Compendium of Materia Medica'. A 'pound cake' typically refers to a type of cake in Western cuisine, known for its dense texture and simple ingredients. The term 'packaging design' refers to the visual and functional aspects of packaging that protect and promote a product. There may be a misunderstanding in the term 'Li Shizhen pound cake,' as Li Shizhen is not associated with pound cake. However, if this is a fictional or artistic project, the response would be about the design of a pound cake packaging inspired by the historical figure Li Shizhen, incorporating elements from traditional Chinese medicine or his work.