EXPLAINER: How China is using metal barriers to fight COVID

TAIPEI, Taiwan (AP) — Several districts in Shanghai put up metal barriers last weekend as part of the city's battle against a COVID-19 outbreak, in a move that drew protests and anger from some residents.

Workers in white head-to-toe protective gear erected mesh wire fences and metal sheets to block off roads, residential communities and even the entrances of some apartment buildings. A majority of the city's 25 million residents had already been prevented from leaving their homes during a month-long lockdown, though some neighborhoods have since opened up.

The barriers are deployed to ensure control over movement and often leave only a small entrance that can be easily guarded.

IS THE USE OF METAL FENCING OR BARRIERS NEW?

The barriers are new to Shanghai but have been deployed throughout the pandemic in other cities across China. For example, early in 2020, some neighborhood committees — the lowest rung of local government — erected metal sheets and fences in parts of Beijing to control access points to homes. Wuhan, where the first cases of COVID-19 were reported in December 2019, also erected metal barriers across the city.

How they have been deployed varies. Sometimes the government sets up fencing around entire neighborhood blocks, leaving just one or two entrances. In other cases, they build fences in front of individual residential complexes.

The fencing has been widely deployed in border regions as well, including in Suifenhe, a city in the northeast that borders Russia. The metal barriers there block off entire streets.

WHY DID PEOPLE PROTEST IN SHANGHAI?

Shanghai had not erected metal barriers on a wide scale during the past two years of the pandemic, priding itself on more targeted measures that did not rely on lockdowns. That changed in the latest...