Guinness is a kind of dark beer brewed from malt and hemp seeds. Every bottle of Guinness and every can of Guinness beer has a familiar signature on the paper label. This famous history began in 1795 when Arthur Guinness opened a brewery in Dublin, Ireland. They began to try to make a beer developed in London-"Bota wine", which contains roasted barley, so its color is dark black and unique. The beer improved by Mr. Guinness is a Bota wine with higher alcohol content and mellow taste-also known as "stout beer" (English name means stout beer, which is just right to describe its strong taste). Besides roasted barley, Guinness stout has four other main components: malt, water, snake pit and yeast. Guinness exports its mature dark beer in Dublin overseas through special procedures, so that it can be mixed with Guinness overseas beer to ensure the pure taste.