2, unified understanding and norms. Partners should have a basically consistent understanding of the same goal, the way to achieve the goal and the specific steps; In joint action, the partners must abide by the social norms and group norms recognized by * * *.

3. A cooperative atmosphere of mutual trust. Creating a good atmosphere of mutual understanding, mutual trust and mutual support is an important condition for effective cooperation.

4. It provides a certain material basis for the survival and development of cooperation. Necessary material conditions (including equipment, communication and transportation equipment, etc.). ) is the premise of smooth cooperation, and the best cooperation distance in space and punctuality and order in time are all components of material conditions.