The Chinese word **筛选 (shāixuǎn)** is a compound formed by combining two meaningful characters: **筛 (shāi)**, which literally means "to sift" or "a sieve," and **选 (xuǎn)**, which means "to choose" or "to select." The term vividly employs the metaphor of using a sieve to separate finer particles from coarse ones, thus creating the combined meaning of "to sift through and select." It describes a process of carefully filtering, evaluating, and choosing the best or most suitable items from a larger group, commonly applied in contexts such as data filtering, candidate recruitment, or natural selection.