Method 1: Stamp the contract with PS. The premise of this operation is to convert the contract from text form to picture form, then import it into Photoshop, and then put the seal in the right place. Method 2: The sealed and signed contract is scanned into the computer by scanner for storage and information transmission. Operating steps: print the words that need to be stamped and signed in the electronic document contract-sign and seal manually-scan the contract into the computer again with a scanner. Method 3: Save the contract as an electronic file by taking photos. Print out the parts of the contract that need to be signed and sealed, then sign and seal, take photos with your mobile phone or camera and upload them to your computer for storage. Article 490 of Article 33 of the Civil Code of People's Republic of China (PRC) If the parties conclude a contract in the form of a contract, the contract is concluded 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.