You can't. Pubs are commercial organizations whose main purpose is to make profits. Bar operators will buy goods from suppliers and then sell them to consumers. If they are allowed to bring their own drinks, it will affect the profitability of the bar, so Ermayina Bar in Shijiazhuang can't bring drinks in. Pubs generally refer to wine and food stores, which are used for drinking and operating businesses, providing information exchange, and later increasing the operation of catering industry.