"Flag" is a wine flag. Later generations said: "The wine market has flags, which were first seen in some places." It can be seen that as early as 2000 years ago, our people knew that wine flags were used as a special form of advertising to spread commodity information.

Generally speaking, the function of ancient wine flags is roughly the same as that of current signboards, light boxes or neon lights. In order to attract customers, the name of the store must be hung on the wine flag, or hung on the shop, so that it can fly with the wine flag in the wind. Some stores also indicate the operation mode or sales quantity on the wine label for customers to see clearly.

For example, the "wine curtain" in Qilu Lantern and Half-Day Flying at the Xiangfu Stage in Kaifeng on March 3 rd read "No credit sale now"; The "Three Bowls of Different Mountains" in Water Margin was written by the flag of the former owner of Wu Song who killed the tiger, and the "Heyang Yue Feng" flag of Jiangmen God in Mengzhou is a household name. These two golden flags are not inferior even compared with modern advertising language.

The purpose of wine market is to attract customers as a signboard, which is usually called "watch". For example, in the Biography of China's Poems, "People have street wine, and when it is beautiful, the table is very long". This signboard is usually hung on the head of the restaurant, which is very eye-catching, so that passers-by can see that the trademark is usually sewn with cloth (plain and green) with the word "wine" in different sizes on it.

Wine flag, also known as "wine curtain" and "Wang Zi". For example, many hotels along the Qingming River have the words "new wine" and "small wine". They are white or blue, but the materials used for wine flags are not limited to green and white. For example, Tang's Pub describes the bustling scene of Chang 'an Hotel, the rise of luxury pubs in Beijing, and colorful wine flags.