I balked at that claim too, so I looked it up. Here's what might be the source : https://www.cnbc.com/2020/02/01/coronavirus-more-of-china-extend-shutdown-accou

I balked at that claim too, so I looked it up. Here's what might be the source : https://www.cnbc.com/2020/02/01/coronavirus-more-of-china-extend-shutdown-accounting-for-80percent-of-gdp.html https://www.cnbc.com/2020/02/01/coronavirus-more-of-china-ex...