The cap of Fangzhuang Beijing Erguotou export-type square bottle 1688 is usually printed with the words "Erguotou". Erguotou is a well-known liquor brand in China. The brand name printed on the bottle cap can help consumers identify the product and ensure its quality and authenticity. At the same time, 1688 may be information such as the product batch or production date. If you need further information about this product, we recommend that you consult the brand or sales channel.