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 under reporting 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 reports no new virus deaths for first time
A visual guide to the world in lockdown
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. On Wednesday, Wuhan is set to allow people to leave the city for the first time since the lockdown began in January.
Officials say anyone who has a “green” code on a widely used smartphone health app will be allowed to leave the city.
Some people in “epidemic-free” residential compounds have already been allowed to leave their homes for two hours.