Starting from April 5, Shanghai will implement a "\\;venue code"\\; and an all-in-one machine for health checks, or "\\;digital sentry,"\\; citywide as a new beefed-up measure to monitor and curb the spread of the COVID-19 pandemic.Residents will be required to scan the "\\;venue code"\\; to enter some key locations in the city.The venues include schools, residential compounds, government institutions and services centers, commercial complexes, malls and supermarkets, theaters and cinemas, public facilities such as libraries, museums, exhibition centers etc, pubs, restaurants, hotels, gyms, tourist attractions, parks, entertainment venues such as dance halls, escape rooms and game rooms, service venues such as massage parlors and hair saloons, medical institutions, factories, long-haul bus stations, airports, and passenger terminals, including for ferries.