About 25 million residents in Shanghai have been shut in their homes since early April, as officials rush to curb its worst ever outbreak since the beginning of the pandemic. The city has struggled to provide fresh vegetables and other essentials to those in lockdown, while patients have reported trouble accessing regular medical care as thousands of health staff were deployed to covid testing and treatment. The issues were chronicled in a six-minute video titled “Voice of April”, which was widely shared on Weibo and WeChat — major social media platforms in China. Shot against a simple aerial black-and-white view...