Shanghai authorities chose to continue their draconian “zero-COVID” strategy on April 6 after ordering another round of citywide tests to control an outbreak that a local official described as “extremely grim.” Gu Honghui, Shanghai’s deputy secretary-general, made the grim assessment during a briefing on Wednesday. He said the new COVID tests would target mainly locals whose residential compounds had reported infection cases between April 1 and April 5. Additionally, individuals who have tested negative after an initial positive result would also undergo another round of testing. While Gu did not specify how many residentials will undergo the latest round of testing, millions will likely be tested in the city with a population of about 24 million. Until all the required tests are done, Gu said the existing curbs would remain in place. Gu also announced that there were 17,077 new infection cases for the previous 24 hours, bringing the city’s …