“SNATCH GROCERIES first, then get a covid test” has quickly become an anthem for the lockdown that started suddenly in Shanghai in the early hours of March 28th. Local hip-hop artists CATI2, P.J. and Keyso describe scenes of panic buying—qiang cai, or snatching groceries—and the threat of being locked out of one’s home amid a frenzied bid to control an outbreak of covid-19 in China’s main business and finance hub. One lyric hints…