"China has chose to donate another Dollars 30 million in cash to the WHO in addition to the USD 20 million cash donation to support the global fight against COVID-19 to help strengthen developing countries health systems", Geng said.
The US is the largest donor to the Geneva-based WHO.
The United States has been the biggest overall donor to the World Health Organization, contributing over $400 million in 2019, roughly 15% of its budget.
Michael Ryan, emergencies director at the World Health Organization, said the United Nations body first spoke of an event in Wuhan on January 4 via Twitter and provided "detailed information" the following day to all member countries.
Pompeo's comments came as last week President Donald Trump said the U.S. is looking into reports that the novel coronavirus, "escaped" from a virology laboratory in Wuhan city, the epicentre of the virus outbreak in China.
Trump's decision also drew immediate criticisms by the country's long-term European allies. "As the organisation's leading sponsor, the United States has a duty to insist on full accountability", he said.
World Health Organization rejected the accusations and its chief Tedros Adhanom Ghebreyesus said he hoped that "the freezing of the funding will be reconsidered and that the USA will once again support World Health Organization".
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Spokesperson Geng Shuang told a news briefing that the World Health Organization, led by Director-General Tedros Adhanom Ghebreyesus, had actively fulfilled its duties with objective, science-based and fair position and played an important role in assisting countries in responding to the outbreak and boosting worldwide cooperation on COVID-19.
Foreign Affairs Minister Francois-Philippe Champagne said questions about the WHO's role in the pandemic should be answered later, not during the global effort to stop the spread of the novel coronavirus.
Most other participants focused in their statements on health, economic and social problems resulting from COVID-19, the disease caused by the virus. A US$20 million donation was made in early March.
US President Donald Trump alleges that the WHO's angle is biased and tilted in favor of China.
US Secretary of State Mike Pompeo charged Thursday that China may have known of the new coronavirus as early as November, renewing accusations that Beijing has not been transparent and again drawing ire from China.
The Trump administration has repeatedly criticised China's handling of the coronavirus outbreak, which began late a year ago in the Chinese city of Wuhan and has grown into a global pandemic. During media briefings, Pompeo refused to rule out that deadly coronavirus leaked out of a laboratory in China's Wuhan city and pressed to allow inspectors into the sensitive laboratories surrounding the city.