https://apnews.com/4c5c7f080cd9cd9b8bd635bf9b7b1369 > HONG KONG (AP) — Encrypted messaging app Signal appears to have been blocked in mainland China, the latest foreign social media service to cease working in a country where the government tightly controls the flow of information. > As of Tuesday, users of the app within China had to connect to a virtual private network (VPN) that allows them to circumvent China’s so-called Great Firewall, a censorship system which blocks websites, services and apps deemed inappropriate by the Chinese government.