Before Liu Bang trained talents, he ran around to meet people. For example, he went abroad to see Zhang Er to prepare for the uprising, set up an organization and generate strength. He said that he doesn't do production work, and a person with great worries can only do the same thing. So he gives the impression that he doesn't do production work. Liu Bang remembered something earlier, when Ying Zheng was still alive. At that time, there were many problems in the State of Qin, but Ying Zheng failed to find and solve them in time and took corresponding measures. There was a lot of people on every side. Because of this preparation, the uprising broke out and expanded rapidly after the death of Ying Zheng, and destroyed the State of Qin in three years. It took a long time to brew the great uprising, and the existing problems can be seen.