After the two parties sign the contract, the deposit paid by WeChat transfer is valid. After the contract and its deposit clauses are established according to law, they are protected by law. If the purpose of the contract cannot be achieved due to the breach of contract by the party paying the deposit, it has no right to request the return of the deposit.

However, if the party receiving the deposit breaches the contract and fails to achieve the purpose of the contract, it shall return the deposit twice.