The city of Heibe has gone on a hunt for the causes of the transmission of the virus in the city.
In this municipality of 1.5 million inhabitants separated only by the Amur River from Russia, the authorities suspect that the virus is "imported" by smugglers, poachers or cross-border fishermen.
To find out more, she decided to offer a bonus of 13,500 euros to people who can deliver information.
"In order to discover as quickly as possible the source of the contamination and the chain of transmission, it is necessary to wage a popular war of epidemic control and prevention", explained the municipality.
Millions of Chinese in quarantine in the country
The north of the country has been facing sporadic outbreaks of epidemics, especially since the end of October.
Faced with this, the authorities have decided to react firmly, wishing to stop the contamination in the run-up to the Beijing Olympics next February.
Currently, the number of cases detected daily in China remains very low with only 43 cases in the 24 hours nationwide.
But the latest epidemic upsurge has led to the quarantine of millions of inhabitants.
In Beijing, residents are invited not to leave the capital unless absolutely necessary.