Dalian City in northeast China's Liaoning Province has entered "wartime" mode to battle the new COVID-19 cluster linked to a local seafood processing company, the city's authorities said on Thursday.
Dalian reported nine new cases of COVID-19 from Thursday to 3 p.m. on Friday, and 27 asymptomatic cases.
Northeast China's Heilongjiang on Friday also reported two new asymptomatic cases, who came into close contact with confirmed cases in Dalian.
Dalian has screened, quarantined personnel and conducted nucleic acid testing citywide after one locally transmitted case was reported on Wednesday.
The city government announced Friday that all residents traveling out of Dalian must provide certificate of a negative coronavirus testing result received within seven days.
Local officials urged fast disinfection in key areas, including malls, wholesale markets cold-chain warehouses, and closure of public airtight places, such as internet cafes and shower rooms in medium-risk areas.
The municipal government called on medical institutions to upgrade level of precaution to prevent coronavirus transmission at hospitals.
For residential communities under closed-off management, the city has established a team to provide daily necessities.