Qingzhou, a county-level city in Weifang City, Shandong province

(literary) a metaphor for high-quality wine; derived from a story in [[世说新语|世說新語|shi4 shuo1 xin1 yu3]] where "Qingzhou Assistant" implies the wine reaches the navel (a pun on a place name), meaning it is good wine; contrast with [[平原督邮|平原督郵|ping2 yuan2 du1 you2]] for bad wine