Legal analysis: sealing the city is a special epidemic prevention and control measures, during the epidemic out of the city on and off the highway need to provide two codes, after the unsealing of the field to go to the field whether you still need to isolate depends on the city's management policy and the local epidemic, a city unsealed, does not mean that all the alarms are lifted, and is not the same as the whole city to liberalize the management of the district sealing control. After lifting the channel control, we still need to advocate non-essential not to go out, at the same time, strict health code management, the implementation of personnel with health code green code safe and orderly flow.

Legal basis: "Chinese people's **** and the State Law on Prevention and Control of Infectious Diseases"

Article 41 of the premises or the premises have occurred in a case of Category A infectious disease in a specific area of the people, the local people's government of the location at or above the county level may implement isolation measures, and at the same time reported to the people's government at the next higher level; the people's government of the higher level of the receipt of the report shall immediately make a decision whether or not to approve the decision. If the people's government at the higher level makes a decision not to approve, the people's government that implements the isolation measures shall immediately lift the isolation measures.

During the period of isolation, the people's government implementing the isolation measures shall provide livelihood security for the persons being isolated; where the persons being isolated have a work unit, the unit in which they are working shall not cease to pay them remuneration for their work during the period of isolation.

The lifting of the isolation measure shall be decided and announced by the original deciding organ.

Article 42 In the event of an outbreak or epidemic of an infectious disease, the local people's government at or above the county level shall immediately organize its forces to prevent and control the disease in accordance with the preventive and control plan, and to cut off the means of transmission of the infectious disease, and, if necessary, report to the people's government of the next higher level for a decision, the following emergency measures may be taken and announced:

(1) restricting or stopping the activities of bazaars, performances in theaters and theaters, or other gatherings of people

(ii) suspension of work, business, classes;

(iii) closure or sealing of public **** drinking water sources, food and related items contaminated by infectious disease pathogens;

(iv) control or culling of infected wildlife, livestock and poultry;

(v) closure of places that may cause the spread of infectious diseases.

When the people's government at a higher level receives a report from the people's government at a lower level on the adoption of the emergency measures listed in the preceding paragraph, it shall make an immediate decision.

The lifting of the emergency measures shall be decided and announced by the original decision-making authority.