Link isn’t working for me. 28 days is concerning. That flies in the face of the few hours meme which could be why the link isn’t working. China is concerned with something by sending out all those trucks spraying the streets.
Are they afraid that insects or animals will pick it up?
Found this. Apparently they have been using mist cannons to combat pollution.
Not sure if they are spraying disinfectant or we're seeing anti-pollution measures that predate the virus. https://www.sciencealert.com/china-has-turned-to-mist-cannons-to-blast-pollution-from-the