The contract you signed now is valid, and the wine is real. No guarantee is required, which is clearly stipulated in the product quality law. It must be genuine and the quality must be qualified.

When writing the agreement, it is necessary to specify the variety and name of liquor. You can also stipulate the liability for breach of contract and other contents. So the claim is well founded.

Supplement:

If there is fake wine, you will be responsible for all the losses caused to you. You can also stipulate the liability for breach of contract for one fake and ten penalties.

At that time, you can decide whether to choose actual loss compensation or claim liability for breach of contract according to the size of your losses.