verb · to hang up a signboard or plaque, signifying the formal establishment of an organization or office

这家新成立的研究中心今天正式挂牌办公。

verb · to be officially listed and traded on a stock exchange

该公司的股票已在上海证券交易所挂牌上市。

verb · to open for business or begin practicing a profession, such as medicine or law

他在市中心挂牌开了一家私人诊所。