Big data from Baidu Map from 18/1 to 21/1 shows that a lot of Wuhan people had fled to nearby towns and cities before Wuhan was placed under quarantine.
The right column here on Baidu shows the cities to which Wuhan people had fled. Within 24 hours of quarantine, the traffic ban was extended to 12 nearby cities, covering 37 million people. Cities named in this list mostly matched cities currently put under the traffic ban. China pushed forward the ban to stop the Wuhan people from getting away.
China is a country with advanced AI technology. It is likely for them to collect big data from mobile phones, navigation apps, WeChat, etc., and have these data analyzed with AI to monitor the tens of thousands of Wuhan people’s travel routes as well as the spread of the virus. Whether the use of AI in the analysis of big data is able to reverse the situation and stop the virus from spreading shall be revealed in a week.
This migration map shows how Beijing, Shanghai, Hangzhou, Quanzhou, Fuzhou, Chongqing, Chengdu, Guangshen, Xian, Changsha, Zhengzhou, and Nanchang are all marked as precautionary areas.
On a side note, the largest population of university students in China is Wuhan. They start their spring breaks and leave Wuhan from around 11/1 to 13/1. Since the incubation period of the virus is around 7 to 12 days, it would have developed by the time they are home for New Year family gatherings, leading to unimaginable consequences.
God bless Wuhan, if China fails to stop the epidemic, nearby countries like Taiwan will also be doomed.