Breaking: Chinese Military Medicial Scientist Wu-Chun Cao did aerosol testing

Breaking: Chinese Military Medicial Scientist Wu-Chun Cao led a team into the Fangcang Hospital of the Military Games Stadium many times for aerosol testing to understand effects of biowarfare agents developed by Chinese People's Liberation Army.
The video is to support the evidence that China's army understood biowarfare agents' effects after releasing covid19. The video was in Chinese.
Video source: CCTV of Chinese Communist Party at YouTube.