When the parties conclude a contract in the form of a contract, the contract is established when both parties sign or seal it. To sum up, both signature and seal can be established, but in order to avoid disputes, it is recommended to sign and seal.

Second, detailed analysis.

The agreement does not clearly stipulate the elements of entry into force, and the contract will take effect after being sealed and signed by the three parties. When a legal person or organization signs a contract, it must be sealed, and a natural person may only sign or require a seal. After ratification by the company or recognition by both parties with their own actions, the contract is established and takes effect.

3. What are the conditions for the establishment of a contract?

Both parties shall have the qualifications and ability to carry out legal acts. Both parties should reach an agreement on a voluntary basis. The standards and contents of the contract must be legal. A contract must conform to the form prescribed by law. Contract is a legal act established by both parties on the basis of the expression of will, and it is the main manifestation of private law autonomy.