Joint crime refers to the intentional crime committed by two or more people.
According to the above definition, which of the following acts is joint crime?
Zhang and Li entered a narrow street in the middle of the night with a mask and controlled knives after a conspiracy. Zhang asked Li to hold the street to prevent others from entering. He went deep into the street and robbed a woman of 3,000 yuan in cash with a knife. Zhang wanted to swallow the money and told Li that the woman had no money, and Li believed it. Zhang, Li's behavior was a joint crime