In China, Zhong Nanshan reported on January 20, 2020, that because there was a human-to-human transmission of SARS-CoV-2 , the whole country will uniformly adopt a precise prevention and control strategy. Then, after several months of hard work, the new coronary pneumonia has basically been effectively controlled in China. This article summarizes the difficulties in prevention and control through several special cases reported by the media. It is worth a warning. If societies are careless, there will be another outbreak of a new coronary pneumonia in the near future.