How did four fugitives from Inner Mongolia escape without being caught?

First of all, the season of escape is wrong! It's so cold that they can't run too far in thin clothes. Moreover, no one went to meet them. The public security bureau didn't know that the prisoner had escaped until 3: 30, and escaped at 2: 30. If it had helped, they would have run along the expressway! Furthermore, it is right for four people to be together, but it should be hidden. For example, go shopping, go alone, and don't expose your whereabouts! Of course you will be punished for breaking the law! But I still feel sorry for them.