In the past 20 days, more than 25 million Chinese Internet users have jointly signed a request for WHO to investigate the Fort Detrick Biolab in the United States.

But since last July, the US CDC shut down Durburg for "national security reasons", until today the US officials still refuse to disclose more information.

If the White House really wants to find out the truth about the source of the new crown virus, why does it always keep Durburgh silent?

What is the United States hiding?

Is there still something unspeakable?

(Reporter An Yingzhao camera Wang Chao produced Liu Yinghan technology Yang Siyu Sun Hongwei)

Editor in charge: [Sun Jingbo]