The World Health Organization met Chinese officials for talks on Friday about the surge in Covid-19 cases, urging them to share real-time data so other countries can respond effectively.
The rise in infections in China has triggered concern around the globe and questions about its data reporting, with low official figures on cases and deaths despite some hospitals and morgues being overwhelmed.
The talks came after WHO chief Tedros Adhanom Ghebreyesus urged Beijing to be more forthcoming on the pandemic situation in the world's most populous country.
The UN health agency said the meeting was "to seek further information on the situation, and to offer WHO's expertise and further support."
It said officials from China's National Health Commission and the National Disease Control and Prevention Administration briefed the WHO on China's evolving strategy and actions on epidemiology, variant monitoring, vaccination, clinical care, communication and research and development.
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"WHO again asked for regular sharing of specific and real-time data on the epidemiological situation -- including more genetic sequencing data, data on disease impact including hospitalisations, intensive care unit admissions and deaths," it said.
It asked for data on vaccinations delivered and vaccination status, especially in vulnerable people and those aged over 60.