First, the acts committed by joint criminals must be criminal acts, that is, the acts of joint criminals all point to the same goal, which are interrelated and cooperate with each other to form an organic whole of criminal acts;
Second, the actions of all joint criminals are linked by common criminal goals, forming an organic whole of criminal activities;
Third, there is a causal relationship between the behavior of the joint criminals and the criminal results.
Cooking for a criminal gang was not a crime at first. The person who cooks has no relationship with the criminal behavior and purpose, and has no substantial causal relationship with the criminal result.
Legal basis: Article 25 of the Criminal Law of People's Republic of China (PRC) refers to intentional crime committed by two or more persons together. If two or more persons commit a crime through joint negligence, they shall not be punished as joint crimes; Those who should bear criminal responsibility should be punished according to the crimes they committed.