Legal analysis: As long as the torn contract is legally established, it is protected by law and remains valid after being torn and glued. A legally established contract is legally binding on all parties. Generally, a contract is made in several copies. Even if it is torn by one party, the other party still keeps the original contract, and the contract is still valid.

Legal basis: Article 469 of the Civil Code of the People's Republic of China

The parties may conclude a contract in written form, orally or in other forms. The written form is a contract, letter, telegram, telex, fax and other forms that can tangibly express the contents contained. Data messages that can tangibly express the contents by electronic data interchange, e-mail, etc., and can be retrieved at any time, are regarded as written forms.

article 49 when the parties conclude a contract in the form of a contract, the contract is formed when all 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 writing as stipulated by laws and administrative regulations or agreed by the parties. If the parties fail to do so in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.

article 491 if the parties enter into a contract in the form of letters or data messages and require the signing of a letter of confirmation, the contract is established when the letter of confirmation is signed. If the information of goods or services released by one party through the Internet and other information networks meets the conditions of the offer, the contract will be established when the other party chooses the goods or services and submits the order successfully, unless otherwise agreed by the parties.