SHANGHAI, May 30 (Xinhua) -- Shanghai reported one new imported COVID-19 case and zero increase in locally transmitted COVID-19 cases on Friday, the municipal health commission said Saturday.

The imported case was a Chinese national who departed from the United Arab Emirates (UAE) on May 17 and arrived at Shanghai Pudong International Airport on the same day. He showed symptoms during the isolated observation period and was confirmed as a COVID-19 patient.

The patient has been sent to a designated hospital for medical treatment, while 52 close contacts on the flight have been put under concentrated quarantine.

By Friday, Shanghai had registered a total of 331 confirmed imported cases. Only seven of the patients remain hospitalized and the rest had been discharged from hospital after recovery, according to the commission.

The municipality had reported 341 locally transmitted confirmed cases by Friday, including seven deaths.