North China's Hebei Province reported a total of 326 locally transmitted confirmed COVID-19 cases and 234 asymptomatic cases from January 2 to 10 a.m. Tuesday, Vice Governor Xu Jianpei said on Tuesday.
The commission said 107 of the new cases were local infections and eight are from overseas.
A weak and slow COVID-19 response at the grassroots level, which includes a failed surveillance and reporting system in villages, has spawned the recent domestic cluster infections, said experts.
Tuesday saw 38 asymptomatic cases newly reported, of whom three arrived from outside the mainland. No deaths related to COVID-19 were registered on Tuesday, and 28 patients were discharged from hospitals.
The province reported a total of 90 new cases on Tuesday, and Shijiazhuang, the capital city of the province reported 84 cases and Xingtai reported six cases. The city of Suihua, which borders the provincial capital Harbin, put its 5.2 million people under lockdown.
A new guideline issued by the Beijing Center for Disease Prevention and Control recommended that taxi and ride-hailing operators suspend car-pooling services, and that drivers should get weekly nucleic acid tests and be vaccinated in order to work, the ruling Communist Party-backed Beijing Daily reported. A female who was confirmed with COVID-19 had attended three weddings in four days.
Heilongjiang province reported 36 new asymptomatic cases in Wangkui county, which also went into lockdown on Monday.
The authorities required all departments to strengthen preventive measures and curb the coronavirus from spreading to other provinces. Many provinces have asked migrant workers to refrain from traveling during the break. The team will have to spend 14 days in quarantine, NHC spokesman Mi Feng said.
Another 16 cases were reported in the northeastern province of Heilongjiang and one in the northern province of Shanxi. "The county reported the 1st #COVID19 case on Jan 2 during this round of flare-ups in Hebei", tweeted Global Times.
As the province shares a long border with Hebei, it announced it had entered "wartime status" on Tuesday afternoon and would to strictly conduct checks for people coming from Hebei and other provinces.
Past year in February when the virus began spreading across China authorities had clampdown on weddings calling for nuptials to be delayed and to scale down funerals.
The curbs come ahead of February's Lunar New Year, when hundreds of millions criss-cross China to visit family and friends, and authorities are anxious to contain the spread of the virus before the massive annual migration.
There was one suspected Covid-19 case on the mainland on Tuesday, and 30,114 close contacts remained under medical observation.