BEIJING, May 4 (CNN) - China's National Health Commission reported three new cases of the novel coronavirus today, as domestic tourism surged during the Labor Day "golden week" holiday.

The new cases were all imported -- two in Shanghai and one in Shandong province, according to the commission. There were no new deaths from the virus on Sunday.

As of today, mainland China has officially recorded 82,880 cases -- 481 of which remain active.

In addition, 13 new asymptomatic cases were also reported. Some 962 asymptomatic patients are still under medical observation. The death toll remains at 4,633.

May Day holiday: Millions of Chinese citizens took advantage of their post-lockdown freedom to travel during the Labor Day "golden week" holiday.

The total number of domestic tourists reached almost 85 million for the first three days of the holiday, according to state-run news agency Xinhua.