The name: a son, a grave and a flock of crows
Yiwu’s name comes from a story about filial piety. Yan Wu, a son in ancient Wushang, was said to have carried earth with his bare hands to build his father’s grave. A flock of crows helped him, and their beaks were wounded by the soil; the county was therefore called Wushang — “crow wound”. In 624 AD the name was changed to Yiwu, “righteous crow”. The story is recorded in early texts and local gazetteers, and it still gives the city its moral vocabulary.
Festival link: Qingming, the tomb-sweeping festival, is when the theme of caring for ancestors is most visible across China. Yiwu also has a modern filial-piety cultural festival in October; check local listings.