Authorities in the southern Chinese industrial hub of Guangzhou on Saturday imposed more restrictions on business and social activity, seeking to curb the spread of Covid-19 cases.

The city's Nansha, Huadu and Conghua districts have ordered all residents and any individuals who have travelled through their areas to be tested for the coronavirus, Reuters reports.

Nansha authorities also ordered restaurants to stop offering dine-in services as of Saturday and also called on gyms, pools and other public venues to temporarily cease operations.

About a dozen subway stops throughout the city were also closed.