Zhenjiang is a famous historic city in south of the lower reaches of the Yangtze River with over 3,000 years history, its old name once was Yi,Zhufang,Gudan,Dantu,Jingkou,Runzhou and so on. On the third yearof Zhenghe-title of Hui Emperor's reign in Song Dynasty was named as "Zhenjiang" for it backs on hill and faces to Yangtze River, forming a steepy hypsography and vantage ground for military defense of the Yangtze River Zhenjiang.
    With long history, splendid culture and beautiful landscape, Zhenjiang is  wel known as "the first landscape"as well as its cate,one of the "three delicacies"-Jiaoshan Hill hilsa herring is aparticular famous dish, crystal saltpeter meat, steamed saury and crab dumpling are also have a distinctive flavor. Zhenjiang  aromatic vinegar which is honored  as "three local specialties in Zhenjiang" brings out the best with  these cates one another. The famous poet  and Epicurean, Su dong-po once wrote poem to praise hilsa herrig when he tasted it in Jiaoshan Hill.Famous vinegar matching with delicious dishes, this special flavor increase charm of Zhenjiang.
     Zhenjiang vinegar takes sticky rice as raw  material, it is a kind of typical  rice vinegar. Tao Hong-jing recorded the usage of rice vinegar in <Shenglong Herbal Annotate> in Liang Dynasty. Tao Hong-jing, named  himself Huayang  Hermit, lived in  Soutn-north  Dynasty in Moling, Danyang(nowadays Nanjing) as  a hermit in  Xunqu Hill(nowadays Mao Hill)  and refused the invitation of Emperor Liang Wu, thus got the title of "prime minister in mountain".So the history of Zhenjiang vinegar is over 1,400 years.
    The brewing process of Zhenjiang aromatic vinegar divided in three phase:make alcoholproduce carbohydrate and filter vinegar and in over 40 working procedure,the product cycle is as long as more than 60 days. There is a folk tale that Dukang brewing alcohol, his son brewing vinegar, it is said that Dukan led all his family to come to Zhenjiang and open distillery after he invented brewing method of alcohol,one  his son got the method to use lees to brew vinegar from celestial being in his dream, then he did it and he got a kind of sauce paste-vinegar  with aromatic, acid and sweat taste in  the 21th day, the Chinese name came from  the time the vinegar  was invented. Although the tale can not be validate, the main working procedure  of Zhenjiang aromatic vinegar still takes 21 days today, and the technology is also basically same as the tale.
    Zhenjiang is the place with beautiful landscape,  comfortable climate,  fertilized earth and rich grain product, the sticky rice is of large, round, bright granule, 72% content of which isstarch resulting strong saccharogenic power. Zhenjiang aromatic vinegar fully takes these natural conditions, choicely selec quality sticky rice and applies special ferment  technology, resulting in the special flavor that it is acid but not acerbity,aromatic and slightly sweat,of deep  color and delicious taste,more pure after longer reserve.The vinegar contain rich amino acid,sugar,many kinds of vitamin and microelement. It can remove fishy smell when you cook fish and meat,and kill bacterium when you make cold dishes and dressed with sauce as well.It was recorded that there was a female cook in the official residence  He Shen-the primer minister in Qing Dynasty who was good at using  Zhenjiang vinegar to make delicious dishes, this romantic cook was  enamored of Emperor Qianlong,she spent huge wealth renting a house to wait the emperor on the way he went on ajourney and make cook for him with Zhenjiang vinegar.
    <Herbal Annotation> recorded that vinegar could be used as medicine for it was made from rice. Zhenjiang vinegar has great medical function. With the development of technique,Zhenjiang vinegar has more varieties and function it has developed from traditio cooking type to health and medical type. There are more than one  hundred varieties Danyu brand vinegar with piquancy  taste, ginger juice taste,garlic taste and honey taste,product package is also integrate tradition with fashion to enhance product grade.Zhenjiang vinegar is both characteristic gift tallying with modern trend and elaborate vinegar on table of common people.
    The development of Zhenjiang vinegar acquire  care and support  from all levels government.In 1991, Zhenjiang Government specially issued a file to guarantee the flavor and chcer of Zhenjiang vinegar and normalize the producing of vinegar brewing industrythe standa water quality producing technology, health establishment, testing  equipment and raw materials  are strictly regulated in the file that make the quality of vinegar is steadily improved. Furthermorecompany took advantage the national preferential policy of sauce industry and rely on modern advanced techniqu to reform traditional industry to increase producing ability with large scale.
    <Chinese Medicine Grand Pharmacopoeia> records that the best vinegar is produced in Hangzhou and Shaoxin county in Zhejiang Provincebut the better is in Zhenjiang,Jiangsu Province.Zhenjiang vinegar occupy the top position with its special flavor, maximum output, higher popularity in the four famous vinegar.