The storage time of unsealed red wine depends on many factors, including the quality of wine, storage conditions and the way of processing after unsealing. Here are some general suggestions:
1. Wine quality: high-quality red wine can be kept for a longer time after opening, while low-quality red wine may deteriorate faster.
2. Storage conditions: red wine should be stored in a cool, dry and dark place. After opening, the wine should be placed in the refrigerator and the air into the bottle should be minimized. If there are vacuum pumps or other sealing tools, they can be used to keep the wine fresh.
3. Treatment after opening: Once the wine bottle is opened, the red wine will start to contact with the air, thus gradually oxidizing and deteriorating. Therefore, it is best to drink the wine within a few days after opening. If it needs to be stored for a long time, the remaining wine can be poured into a small bottle and sealed with a sealed cap.
Generally speaking, the wine in Kaifeng can be kept for 3-5 days. If the wine needs to be stored for a longer time, the above methods can be used to extend the shelf life of the wine. However, it is best to drink the wine within its shelf life to ensure the best taste and quality.