As China pursues a zero-Covid policy, Tianjin aims to test all its residents within 48 hours.As China pursues a zero-Covid policy, Tianjin aims to test all its residents within 48 hours.
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As China pursues a zero-Covid policy, Tianjin aims to test all its residents within 48 hours.As China pursues a zero-Covid policy, Tianjin aims to test all its residents within 48 hours.