1, Shanghai has a high population density, and many factories affected by the epidemic can't work normally, which will not only affect the transportation and delivery of goods, but also have a great impact on China's import and export goods, resulting in a large number of materials and materials being unable to be transported in time, leading to accumulation, leading to the inability to replenish materials in time in all parts of China and hindering the development of the national economy. After all, for some high-tech products, no material is impossible to produce. In addition, the added value of service industry and industry will also drop sharply. Due to the impact of the epidemic, it has seriously affected the production of the labor force and the service of the service industry to the people. It will not only affect the economic income of the tertiary industry, but also affect the national economy, especially the catering industry.