BEIJING, CHINA — Businesses reopened and testing requirements were relaxed in Beijing and other Chinese cities on Monday as the country tentatively eases out of a strict zero-Covid policy that sparked nationwide protests. Local authorities across China have begun a slow rollback of the restrictions that have governed daily life for years, encouraged by the central government’s orders for a new approach to fighting the coronavirus. In the capital Beijing, where many businesses have fully reopened, commuters from Monday were no longer required to show a negative virus test taken within 48 hours to use public transport. Financial hub Shanghai…