Hard-hit Hubei, the epicentre of the coronavirus outbreak in China, will relax travel restrictions to allow healthy people to move within the province, officials said Tuesday.

Hubei has been under lockdown since January with some 56 million people under quarantine, but the number of cases has declined in recent weeks.

According to the provincial government, a mobile app will be used to give residents a coloured health code, and people labelled “green” in medium and low-risk areas will be allowed to travel within the province.