The Chinese word 步行 is formed by combining two characters, each contributing to the overall meaning. The first character, 步 (bù), pictorially represents a foot taking alternating steps and means "to step" or "a pace". The second character, 行 (xíng), depicts a crossroads and carries the core meaning of "to walk" or "to go". Together, they create a compound where 步 describes the manner, step-by-step, of the action 行, resulting in the combined concept of "to travel on foot" or "to walk". It is a logical, ideographic combination where the meaning of the whole is directly derived from the conjunction of its parts.