Up to 20,000 tourists visited the Huangshan National Park in Anhui. Pictures show people packed into the attraction without appearing to follow social distancing measures.
Many wore face masks but some did not have protective equipment.
Visitors can be seen crammed side by side on the narrow pathways between the mountains.
The park, which has reopened after closing on January 25, waived its entry fee to attract tourists.
Visitors underwent health screenings including having their temperatures taken.
But the park was forced to turn people away after reaching full capacity.
Officials are offering free entry to 31 attractions in Anhui from April 1 to 14 in a bid to boost tourism.
It comes as China, which has reported 81,708 coronavirus cases and 3,330 deaths since the outbreak started in Wuhan in December 2019, has begun relaxing strict lockdown restrictions.
He told Sky News: “There are major questions and frustrations that the Chinese sat on this for four weeks.
“I’m afraid they have form here, when the SARS virus came out they didn’t inform the World Health Organisation for 88 days.
“Now imagine if we had four extra weeks to put things into place.
“Of course, there will also be questions about our own conduct and the decisions we are making here.
“But ultimately the entire globe is affected by this.
“There will be a global recession, there needs to be some form of domestic martial plan in my view.
“There also needs to be some form of global recovery roadmap as well.”
In the UK, there have been 51,608 confirmed cases and 5,373 have died.