1, the total employment supply decreased.

The outbreak of COVID-19 epidemic has had a great impact on China's economy. According to the data released by the National Bureau of Statistics, China's GDP in the first quarter was 20.65 trillion yuan, down 6.8% year-on-year [3], which means that the outbreak of the epidemic has had a great impact on the production and operation of enterprises. According to the survey of COVID-19 Epidemic Impact Assessment Report (April 2020) issued by the representative office of the United Nations Development Programme in China, in the first quarter of 2020, 40. In particular, the epidemic has hit the tertiary industry the hardest, with many enterprises closing down and the employment of enterprises greatly reduced. The pressure faced by enterprises directly leads to the reduction of employment. At the same time, affected by the epidemic, more enterprises tend to have negative expectations for the future economic prospects, and their investment will also decrease, resulting in a sharp drop in the recruitment demand of college graduates. According to the latest labor market survey in China, the number of jobs in China's labor market decreased by nearly 30% in the first quarter of 2020 due to the epidemic.

2 The employment structure has been impacted. From the perspective of industry, the COVID-19 epidemic has the greatest impact on the service industry. Affected by the epidemic, in the first quarter of 2020, restaurants, hotels, cinemas, tourist attractions and other service places could not operate, resulting in an instantaneous shortage of capital flows and on the verge of bankruptcy. The tertiary industry accounts for more than half of China's GDP and plays an important role in stabilizing and promoting employment. Affected by the epidemic, many college graduates majoring in tertiary industry cannot achieve full employment in a short time, and a small number of them will transfer to secondary and tertiary industries for employment. The report "The Impact of COVID-19 Epidemic on the Labor Market, China and the Global Industrial Chain" issued by Guanghua College of Peking University shows that the number of recruitment positions in the cultural media and service industries decreased by more than 409% from June to April 2020 [4]. From a regional perspective, affected by the epidemic, the free flow of population across regions will be restricted in the first half of 2020, and the cross-regional employment of college graduates will be affected. In the short term, the employment area of college graduates tends to be within the province. With the global spread of novel coronavirus, more and more countries and regions have implemented entry-exit control, which has restricted the channels for many college graduates to study abroad and further their studies, thus increasing their opportunities for further study and employment in China. In terms of enterprise scale, according to the investigation of relevant parties, small and micro enterprises with less than 100, medium-sized enterprises with 100- 1000 and large enterprises with more than 1000 were affected by the epidemic, and the number of enterprise posts decreased by more than 30%, 20-30% and 20-respectively. From the nature of enterprises, foreign trade enterprises are most affected by the epidemic. Relevant data show that the number of positions recruited by foreign trade enterprises in the same period was less than 65%. Online retail enterprises of food, medicine and logistics were least affected by the epidemic, especially some online consignment enterprises, which were not affected by the epidemic. On the contrary, it has a good development trend.