So far, has been identified close contacts 572 people, in which 12 carriers without symptoms are identified from close contacts inventory test, all in the first time to implement the centralized protection close contacts and carry out testing; For the benefit of the pneumonia epidemic originated from tracking, Dalian will be tested positive samples sent to our country, the provincial CDC to carry out high-throughput sequencing In the comprehensive prevention and treatment of this pneumonia epidemic, especially in the focus on the staff and goods natural environment level management approach. Persisting on the standard of four early, from the fast from the rapid increase in the magnitude of the inventory, the first time on the company's staff to carry out a full range of tube buckle, increase the test, each unit to accelerate the precise and deep level of the time to Xingxue. research, as early as possible An search to all. Close contacts, and included in the centralized. Protect close contact in addition to the patient's work, daily life outside the natural environment, foodstuffs outside the box test collection, by the pathogen tracking show based on. Adopting the standard of hierarchical classification and regulation to take the patient case as the center point of the circle, and carry out the regulation in three levels. The first time for the close contacts of the disease case. Flexible use of the Internet big data and information management services support to enhance the magnitude of clinical epidemiological inventory. The second layer for the case of close contacts of the touched, in accordance with the location of the district regulatory standards, all by the various districts, counties and cities to implement home protection and testing. The third level is the social development staff who are likely to have cross contact opportunities in the life track of the case. The method of publicizing the life track of the case to the social development is adopted to find the staff who are likely to experience contact with the case and perform home protection observation and testing on them. To the disease case one belongs to the seafood processing company industrial zone, the freezer and its 18 self-owned stores to carry out the stopping and sealing, and adopts the freezer, the food industry production workshop, the sleeping room. Horse farm public **** restroom of the natural environment test fresh results in several positive. The case two belongs to the company's production workshop canteen, public **** restroom also carry out the natural environment, at this stage the results are all negative, to the case of the track of action involves the sales market store outside the natural environment. Test collection test, at this stage has collected 1318 copies of the test, all sent to Dalian. Center for Disease Control to carry out testing.