began accepting patients on 28 january 2020 at 10:30 pm. in wuhan, authorities seized dormitories, offices and hospitals to create more beds for patients. on 25 january authorities announced plans for leishenshan hospital, a second specialty hospital, with a capacity of 1,600 beds; operations are scheduled to start by 6 february. the hospital opened on 8 february. by 16 february 2020, 217 teams of a total of 25,633 medical workers from across china went to wuhan and other cities in hubei to help open up more facilities and treat patients. a total of 14 temporary hospitals were constructed in china in total, but all were reported to have closed after the crisis was determined be under control on 10 march 2020. on march 31, the chinese government announced that large-scale domestic transmission of covid-19 had been stopped. end of the first outbreak the public health measures put in place from 23 january 2020 onward suppressed transmission of the virus below the critical threshold, bringing the basic reproduction number of the virus to near zero. on 4 february 2020, around two weeks after the beginning of the lockdowns in hubei province, case counts peaked in the province and began to decline thereafter. the outbreak remained largely concentrated within hubei province, with over 80% of cases nationwide through 22 march 2020 occurring there. as the epidemic receded, the focus shifted towards restarting economic activity and preventing a resurgence of the virus. low- and medium-risk areas of the country began to ease social distancing measures on 17 february 2020. reopening was accompanied by an increase in testing and the development of electronic "health codes" (using smartphone applications) to facilitate contact tracing. health code applications contain personalized risk information, based on recent contacts and test results. wuhan, the last major city to reopen, ended its lockdown on 8 april 2020. china reported its first imported covid-19 case from an incoming traveler on 30 january. as the number of imported cases rose and the number of domestic cases fell, china began imposing restrictions on entry into the country. inbound flights were restricted, and all incoming passengers were required to undergo quarantine. the death toll in china during the first outbreak was approximately 4,600 according to official figures, and has been estimated at under 5,000 by a scientific study of excess pneumonia mortality published in the bmj. blood samples taken by the chinese cdc from a random sampling of 34,000 citizens in wuhan and other parts of china one month after the virus first wave was contained showed 4.43% of sampled community members in wuhan had antibodies. in the wider hubei area, 0.44% of those sampled were positive for antibodies, while of 12,000 nationally representative samples taken only two recorded positive results. early censorship and police responses