24 months. According to the inquiry of Wang Shouyi Thirteen Spices products, the shelf life of Wang Shouyi Thirteen Spices is 24 months. If the shelf life of Thirteen Spices exceeds 24 months, its aroma and flavor may gradually change, resulting in a decrease in its cooking effect. It may also harbor bacteria or other microorganisms, which can lead to food spoilage, mold and mildew, bacterial growth and other conditions, thus posing a risk to human health.