A city in northern China is offering rewards of 500 yuan ($100) for anyone who reports on a resident who has not taken a recent coronavirus test.
The offer from the government of Nangong comes as millions in the city and its surrounding province of Hebei are being tested as part of efforts to control China's most serious recent outbreak of COVID-19.
The offering of cash or other rewards for information on political or social non-conformists has a long history in China but the pandemic is putting a new face on the method.
Those found non-compliant will be forced to undergo testing and a two-week quarantine at their own expense.
China has largely controlled local transmission through the use of measures considered by some to be extreme and highly intrusive, including lockdowns of entire cities and close electronic monitoring of bans on travelling to and from parts of the country.
With next month's Lunar New Year travel rush looming, the government is telling people to stay put as much as possible and not travel to or from the capital Beijing, disrupting the country's most important time for family gatherings.
Schools are also being let out a week early although many, including those in Hebei, have already reverted to online learning.
Australian Associated Press