China does not count positives tests that remain asymptomatic.
"The tally of confirmed cases was further suppressed, with the Government initially not including clinical diagnoses and later excluding people who test positive without symptoms.
But public pressure helped forced China's National Health Commission to rectify those omissions, even though it continues to exclude asymptomatic cases from the headline daily figure of cases."
https://www.abc.net.au/news/2020-08-...overy/12594828