(1) Authentic product:

Produced by Jiangsu Shuanggou Winery (formerly Jiangsu Quhong Shuanggou Winery), the registered trademarks are Shuanggou brand and Shanhe brand, and the bottom of the bottle is printed with "HB", "SB" or clear glass mark. The sealing uses a polyvinyl chloride suspension plastic cover, and the outer cover is a drying rubber sleeve, which is printed with the words "Jiangsu Shuanggou Winery" in white. A small amount of iron covers are also used, with blue as the main color and the superscript "Shuanggou Daqu". , "Jiangsu Shuanggou Winery", the center pattern has the words "Mountain and River", and the bottle neck label has the words "Jiangsu Famous Wine" printed on it. The year, month, day and shift are printed in blue on the back of the trademark bottle sticker. The wine is clear and transparent, with no suspended solids or sediment.

(2) Counterfeit products:

The wine bottles are mixed, with tin caps or "Jiangsu Shuanggou Winery" paper tapes. The neck label is "Shuanggou Mountain River Daqu". Although the year, month and day are printed on the label bottle, there is no shift and the writing is in red or blue. If the wine is turbid or has sediment, it is of poor quality.