Efforts to free the miners, who were stuck underground for 14 days, took a dramatic turn on Sunday.
In the city where the virus first emerged there is now an insistence that it came from elsewhere.
The country agreed to buy $200bn worth of US goods in a trade agreement signed one year ago.
The survivors in the collapsed Shandong province mine have been underground since 10 January.
The world's first coronavirus quarantine began in Wuhan a year ago - how has China changed since then?
The actress has been accused of abandoning children she had through a surrogate.
Fears had grown over the Alibaba founder's whereabouts because of pressure from Chinese authorities.
The declaration came a day before the Trump administration hands over to President-elect Joe Biden.
Communication with 11 men trapped in Chinese gold mine sparks hope of rescue, but 11 are missing.
Rescuers say at least 12 Chinese workers are alive a week after an explosion blocked the mine's exit.
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