1. Yes. Cooperating parties can sign a contract to protect the rights and obligations of both parties, but the premise is that both parties need to sign and seal the contract before the contract can take effect. The signing party can be one or two people. 2. If it is signed by two people, it means that if there are any problems or disputes in the future cooperation process, both people need to jointly bear the responsibilities and obligations, and the responsibility cannot be passed to one of the parties.