The word "上升" is formed through the conceptual combination of two individual characters, each contributing its core meaning to create a unified idea. The first character, "上", pictographically represents "above" or "upward", while the second, "升", depicts "rising" or "ascending", originally illustrated by a plant growing upward from the ground. When paired, they create a powerful visual and conceptual synergy, where "上" defines the direction and "升" supplies the action, merging into the single, reinforced notion of upward movement or increase.