What is a subscription book?

Let me ask you a question first. Are you a property consultant? If not, I don't blame you. Subscription is a letter of intent to be signed after the customer pays the deposit for the purchase of a house, and it is a property that has been confirmed to subscribe. After signing the subscription book, the subscribed house can no longer be sold to the outside world. For example, a subscription for breach of contract will generally specify the responsible party. If the seller sells the heavy house, it will be regarded as the seller's breach of contract, and the owner can ask for double deposit compensation. This is legal.