‘往来’ (wǎng lái) literally combines ‘往’ (to go toward, to head to) and ‘来’ (to come), forming a balanced, reciprocal concept of movement in both directions — ‘to come and go’. As a noun, it refers to regular interaction or exchange between people, organizations, or places; as a verb, it describes the act of moving back and forth or maintaining ongoing contact. It often implies continuity, frequency, and mutual engagement — not just one-time movement but sustained connection.

This term appears frequently in formal and semi-formal contexts: business communication (e.g., ‘业务往来’ — business dealings), transportation (e.g., ‘航班往来频繁’ — frequent flight traffic), and social relationships (e.g., ‘邻里往来’ — neighborly interaction). While it can describe physical movement, its more common and nuanced use is abstract — denoting relational or functional exchange. It carries a neutral-to-positive connotation and rarely appears in casual speech among young native speakers, who might prefer simpler alternatives like ‘联系’ (contact) or ‘走动’ (visit regularly).