Guangzhou tightens Covid-19 controls as mass tests expose more cases
- Economic powerhouse reports nine more infections, including six in one family
- Authorities screen residents in four districts and upgrade risk level in several zones

Another case was confirmed on Sunday in Wuchuan, a coastal city 400km (248 miles) from Guangzhou, with that patient having returned to Wuchuan from Guangzhou on May 31.

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Guangzhou tightens Covid-19 controls as mass tests expose more cases in Chinese city
Since the outbreak started on May 21, the province has detected more than 100 cases, including infections in the neighbouring cities of Foshan and Maoming.
Of the nine new cases in Guangzhou, three are from Liwan, the city’s most seriously hit district. The six others were concentrated in one family in Nansha district, the southernmost new urban area of Guangzhou, which had not previously reported any infections in this outbreak.
Chen Bin, deputy head of the Guangzhou Health Commission, said on Sunday morning that as of Saturday, four of the city’s suburban districts – Nansha, Zengcheng, Conghua and Huadu – had started mass nucleic acid testing of all residents.
Since May 26, the city has tested 16 million people in 11 districts, finding 33 cases of infection.