Beijing and Shanghai are still trying to get a grip on covid-19

S ince the beginning of June, when the authorities in Shanghai lifted a months-long lockdown , many aspects of life in the city have returned to normal. The once-deserted freeways around China's financial hub are again full of traffic. The white-collar workers who moved into their offices during April and May have at last returned home. The number of cases of covid -19 found outside quarantine has dropped to single digits. Just one was detected on June 13th. But Shanghai 's officials are still on edge. Many residential communities reopened only to be locked down again when a positive case,…