China recorded no new confirmed COVID-19 cases on the mainland for May 22, down from four the previous day, the National Health Commission (NHC) said in a statement on Saturday.
This was the first time China had seen no daily rise in the number of cases since the pandemic began in the central city of Wuhan late last year. The number of new asymptomatic cases of the coronavirus fell to 28 from 35 a day earlier, the NHC said.
The number of confirmed cases in the mainland stands at 82,971. The news came a day after Communist Party leaders celebrated "major achievements" in the virus fight.
The virus first emerged in the central Chinese city of Wuhan late last year, but cases have dwindled dramatically from the peak in mid-February as the country appears to have brought the virus largely under control.
The official death toll in the country of 1.4 billion people stands at 4,634, well below the number of fatalities in much smaller countries.
However, doubt has been cast on the reliability of China's numbers and the United States has led the charge in questioning how much information Beijing has shared with the international community.
The milestone comes a day after the opening of China's rubber-stamp parliament, the National People's Congress, where Premier Li Keqiang said the country had "made major strategic achievements in our response to COVID-19."
However he warned that the country still faced "immense" challenges.
Authorities in Wuhan have come under fire for reprimanding and silencing doctors who first raised the alarm about the virus late last year, and repeated changes to counting methodology have cast further doubt over China's official data.
Beijing has strenuously denied accusations of a cover up, insisting it has always shared information with the World Health Organization (WHO) and other countries in a timely manner.
Since first emerging in Wuhan the virus has spread across the world, claiming more than 335,000 lives globally.