What if the royal bride's wedding photography says that she will send photos when she gets married and then break the contract?

If it is signed by both parties and does not violate the provisions of the law, it will be regarded as valid.

Contract law of the people's Republic of China

Article 114 The parties may agree that one party shall pay a certain amount of liquidated damages to the other party for breach of contract, or may agree on the calculation method of the amount of compensation for losses caused by breach of contract.

If the agreed liquidated damages are lower than the losses caused, the parties may request the people's court or arbitration institution to increase them; If the agreed liquidated damages are excessively higher than the losses caused, the parties may request the people's court or arbitration institution to reduce them appropriately.

If the parties concerned pay liquidated damages for delayed performance, the breaching party shall also perform the debt after paying the liquidated damages.

The Supreme People's Court's Interpretation on Several Issues Concerning the Application of People's Republic of China (PRC) Contract Law (II)

Article 29 If the parties claim that the agreed liquidated damages are too high and request an appropriate reduction, the people's court shall, according to the actual losses, comprehensively consider the performance of the contract, the degree of fault of the parties, the expected interests and other comprehensive factors, and make a ruling after weighing according to the principles of fairness, honesty and credibility.

If the liquidated damages agreed by the parties exceed 30% of the losses caused, it can generally be regarded as "losses caused by excessive exceeding" as stipulated in the second paragraph of Article 114 of the Contract Law.