Depending on length of storage, Zhenjiang Xiang Cu is divided into two categories, viz. ‘Fragrant Vinegar’, which is the regular form with a storage period of over 180 days, and ‘Mature Vinegar’, which refers to Zhenjiang Fragrant Vinegar with a storage period of over 365 days.
Eddike, der har været lagret i mere end 180 dage, betegnes som en duftende eddike (»Fragrant Vinegar«), og en duftende eddike fra Zhenjiang, der har været lagret i mere end 365 dage, betegnes som en moden eddike (»Mature Vinegar«).