The Chinese word "后台" is formed by combining the character "后", meaning "behind" or "rear", with "台", meaning "stage" or "platform", creating the literal sense of "behind the stage". This term originates from theatrical contexts, where it refers to the backstage area where actors prepare and support operations occur. Over time, this concrete spatial concept has been metaphorically extended to describe background support systems in various domains, such as computing (e.g., background processes) or social dynamics (e.g., influential backing), illustrating how Chinese compounds often evolve from tangible imagery to abstract meanings.