Chinese authorities are using apps that monitor whether the user has been in regions with a high risk of contamination by Covid-19 or in contact with someone with the disease to restrict travel by government critics, noted an EFE report published this week. The material contains the testimony of Chinese lawyer Xie Yang, who reported that in early November, when he was traveling from Changsha city to Shanghai, a code in the app on his cell phone changed from green to red, which prevented him from even access the airport. Xie would travel to meet the mother of Zhang Zhan,…