The main consideration is that Putian's local light industry manufacturing industry is developed, and there are many businessmen engaged in this industry, so they often need to run business all over the country; Secondly, before the epidemic rebound in Putian was discovered, some Putian people had left Putian through various channels and came to other parts of China for activities; Moreover, before the rebound of Putian epidemic was discovered, many Putian commodities had been shipped to all parts of the country for trade reasons. The author believes that there are mainly the following three factors.

First, Putian's local light industry manufacturing industry is developed, and there are many businessmen engaged in this industry, which often requires business from all over the country.

Putian's local light industry manufacturing industry is developed, and there are often well-known sports brands or clothing brands at home and abroad, so there are many businessmen engaged in this industry. It is not excluded that a considerable number of businessmen engaged in Putian light industry manufacturing chose various means of transportation to leave Putian in order to contact their business partners after the rebound of Putian epidemic and before the start of the city closure order. The spillover of Putian epidemic has certain potential risks.

2. Before the epidemic rebound in Putian was discovered, a considerable number of Putian people left Putian through various channels.

Before the epidemic rebound in Putian was discovered, a considerable number of Putian people left Putian in various forms and went to all parts of the country. Due to the large population flow in Putian, it is easy to cause the epidemic situation in Putian to overflow. Putian should not only implement the city closure policy immediately, but also inform other major cities where Putian people flow to take corresponding epidemic prevention and control measures.

Thirdly, before the rebound of Putian epidemic was discovered, many Putian commodities had been shipped all over the country for trade reasons.

Before the rebound of Putian epidemic was found in China, many Putian commodities had been shipped to all parts of the country for trade reasons, which would increase more potential risks for the spillover of Putian epidemic, and this risk is explosive at any time. While doing a good job in local epidemic prevention and control, Putian government should also promptly notify other cities where Putian goods flow to take corresponding epidemic prevention and control measures.

Precautions: Residents in all regions should reduce the probability of recent crowd gathering and take corresponding personal prevention and control measures to ensure their own health and safety.