The southern Chinese province of Guangdong reported no new confirmed local cases of Covid-19 for Saturday but preventive measures have been stepped up in the Pearl River Delta cities of Zhaoqing, Shenzhen and Dongguan. Guangdong’s health commission said on Sunday the province reported 12 new imported confirmed cases and nine other asymptomatic imported cases for Saturday. Of the confirmed imported cases, seven were passengers from South Africa heading to Shenzhen, two were from Cambodia and Liberia going to Foshan, another two were from Indonesia and Saudi Arabia going to Jiangmen and one was from Mali bound for Guangzhou. As of Saturday, Guangdong had a total of 2,692 confirmed cases of Covid-19, of which 1,129 were imported. Late on Sunday authorities in Dongguan reported one local confirmed case in the city – a close contact of a previously infected person. The latest outbreak in Guangdong began in the provincial capital Guangzhou on May 21 and is subsiding. Authorities in Guangzhou are gradually easing lockdown measures imposed on key districts, with the spread of the virus appearing to have died down at the community level. But with sporadic cases surfacing in Shenzhen, Dongguan and Foshan in the past few days, measures to restrict traffic between cities in the province have increased. In Zhaoqing, where no cases have been reported, the city’s pandemic control command centre announced new restrictions at its transport terminus. From Sunday, rail and coach passengers who have been to Guangzhou, Shenzhen, Foshan and Dongguan in the past 14 days have to present a negative virus report taken within the previous 48 hours before they are allowed to leave the province from Zhaoqing. For travel within the province, the test can be up to 72 hours earlier. Shenzhen updated its restrictions on Saturday night after the city reported new local cases on Friday, taking the city’s total to 41. One of the cases confirmed on Friday, one was a 21-year-old airport restaurant worker and the other was a 35-year-old Dongguan resident who works in Shenzhen. Hundreds of flights were cancelled at Shenzhen Baoan International Airport and most shops at the facility were ordered to close over the weekend when the sample from the airport worker was identified as the highly transmissible Delta strain. Under the new measures, all passengers leaving Guangdong from Shenzhen via its airport, railway and bus stations or ports from Sunday must present a negative test result valid within 48 hours. More than 9,600 passengers who did not meet the pandemic control requirement were turned back from Shenzhen’s airport on the weekend. Shenzhen authorities have locked down the area in Baoan district where the airport worker was living, closing off 113 buildings and affecting nearly 6,000 people. Another 802 buildings and nearly 32,000 residents surrounding the locked down area have been placed under partial lockdown. The office building in Shenzhen’s Nanshan district where the diagnosed Dongguan resident worked and a residential building that he visited briefly were also put under partial lockdown. Shenzhen authorities have also tested more than 66,000 people in the areas previously visited by the two cases. Meanwhile, nearly 20 million doses of vaccine have been administered in Shenzhen and more than 17 million in Guangzhou.