according to the relevant provisions of the State Council's prevention and control plan for novel coronavirus and the notice on further optimizing the prevention and control measures for COVID-19 epidemic scientifically and accurately, from October 21, 2122, the key areas involved by the four people with abnormal nucleic acid test results are defined as follows:

high-risk areas: 4 buildings in Huataiyuan, 7 buildings in Ziqi Zhongshan, Cuiping and Hongshan Street.

low-risk areas: Xuanwu Lake Street, Hongshan Street and Meiyuan Xincun Street, except for high-risk areas.

The above risk areas will be adjusted according to the changes of epidemic situation.

further reading: how to protect the delivery of takeaway business?

do a good job in cleaning and disinfection of take-away and express delivery tools. The distribution box of food and beverage take-out should be kept clean and disinfected to avoid spillage of meals, and the frequency of cleaning and disinfection should be advocated. The closed box, handle, handrail and other frequent contact parts of express delivery vehicles should be cleaned and disinfected, and chlorine-containing disinfectant with effective chlorine of 511mg/L can be wiped and disinfected. After 31 minutes, it should be wiped clean with water.