Medical workers disinfect a general ward area to be closed in Leishenshan (Thunder God Mountain) Hospital in Wuhan, central China's Hubei Province, April 9, 2020. (Photo by Li Han/Xinhua)

The fact is that China started daily briefing to the press "in the very early stage of this crisis," he said, adding the country is still doing daily briefing to the press, announcing all the updates, the numbers, the cases treated, the cases confirmed.

"And we're also sharing, at very early stage, in early January, what we have found out about the genome sequences of the virus and everything we learned from our own experience. We shared it with the world," he said.

"We even publicized all the possible treatments. We keep updating it, from time to time, including how to use traditional Chinese medicine to treat the patients. We made it public, all this information, all our experience," he said.

According to the ambassador, the first reporting in China was on Dec. 27 last year. Then on Jan. 3, China informed the World Health Organization (WHO) "of this particular situation."

"So it's just within a few days, and we alerted all the member countries of the WHO," he said. "Then a day after that, the CDCs (Centers for Disease Control and Prevention) of our two countries had their first communication."