Legal analysis: Should the contract be sealed by both parties or only one party? There is no legal requirement and you can choose freely. The riding seal can prevent the page number from increasing or decreasing in the contract. If there is a riding seal, you can see the pages of the contract content more or less, which can prevent the falsification of adding pages and maintain the integrity of the document.

When a 40-page contract is stamped with the sewing stamp, each page of the contract should be printed in red, and the first page and the last page should have words at the same time, not only red circles (only red circles are easy to forge), and there should be no missing pages in the middle or before and after. The development of contract should be able to restore the riding seal to the original seal. Only in this way can it be a more standardized riding seal and play its role.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 490 Where the parties conclude a contract in the form of a contract, the contract is formed when the parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.

A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.

Article 491 The parties entered into a contract in the form of data messages. It is also required to sign a confirmation letter, and the contract is established when the confirmation letter is signed.

If the information of a commodity or service released by one party through information networks such as the Internet meets the conditions of the offer, the contract is established when the other party successfully selects the commodity or service and submits the order, unless otherwise agreed by the parties.

Article 492 The place where the acceptance takes effect is the place where the contract is established.

Where a contract is concluded in the form of a data message, the recipient's principal place of business is the place where the contract is established; If there is no main place of business, the domicile shall be the place where the contract is established. Unless otherwise agreed by the parties, such agreement shall prevail.

Article 493 Where a contract is concluded by the parties in the form of a contract, the place where the contract is finally signed, sealed or fingerprinted is the place where the contract is established, unless otherwise agreed by the parties.