China reported no coronavirus deaths on Tuesday, the first time since it started publishing daily figures in January.
The National Health Commission said it had 32 confirmed cases, down from 39 on Monday.
It comes as the government is under scrutiny as to whether it is underreporting its figures.
The government says more than 3,331 people have died and 81,740 have been confirmed as infected.
All of the confirmed cases on Tuesday had arrived from overseas.
China is concerned a second wave of infections could be brought in by foreign arrivals.
It has already shut its border to foreigners including those with visas or residence permits.
International flights have been reduced with both Chinese and foreign airlines only allowed to operate one international flight a week. Flights must not be more than 75% full.
But Wuhan officials revoked the “epidemic-free” status in 45 compounds because of the emergence of asymptomatic cases and for other unspecified reasons.
Asymptomatic refers to someone who is carrying the virus but experiencing no symptoms.
China began reporting asymptomatic cases at the beginning of April.
More than 1,033 asymptomatic patients are under medical observation.
Hitting back at claims China was too slow to raise the alarm, the country’s state media have published what they describe as a detailed timeline of its response and information sharing.
