The term "Xi Jinping" functions as a proper noun. A proper noun is a specific name used for an individual person, place, or organization, and it is always capitalized.
In grammatical analysis, a noun serves as the subject of a verb, the object of a verb, or the object of a preposition. As a proper noun, "Xi Jinping" identifies a unique individual. For example, in the sentence, "Xi Jinping addressed the assembly," the term acts as the subject performing the action. In "Analysts study the policies of Xi Jinping," it functions as the object of the preposition "of." It cannot be modified by articles like "a" or "an" and typically does not have a plural form because it refers to a single, specific entity.
Identifying "Xi Jinping" as a proper noun is fundamental for article construction because it establishes the central entity being discussed. The article will inherently focus on the attributes, actions, or context related to this specific individual. All descriptive words (adjectives) and actions (verbs) in the text will relate back to this noun, making it the grammatical and thematic anchor of the content.