The health commission in China's northwestern region Xinjiang said on Saturday that one local asymptomatic case was detected in Kashgar city, China's first local detected case since October 14.
All close contacts of the patient have been isolated for medical observation and local authorities are carrying out epidemiological investigations, the Xinjiang commission said in a statement.
Kashgar has launched a city-wide nucleic acid test covering the city's 700,000 people. As of Sunday morning, more than 300,000 people had been tested and the rest would be covered within two days, the city government said in a statement.
As of Saturday, mainland China had 85,790 confirmed coronavirus cases, the health authority said. The Covid-19 death toll stands at 4,634.