Software solutions

Alipay Health Code－smartphone software that indicates health status－was rolled out in more than 100 cities nationwide within a week of being introduced in Hangzhou, Zhejiang province, on Feb 11, according to Xinhua News Agency.

After people fill in a survey of their recent travel history, close contacts, temperature and related symptoms, they are assigned a code in green, yellow or red, depending on their suggested physical condition.

Those with green codes can freely enter or exit communities and workplaces, while those with red or yellow codes should enter a period of self-quarantine.

As of Feb 28, more than 15 million people in Zhejiang had registered with the system, which provides a visual indication of whether it is safe for them to return to work. "Have you turned green?" has become a popular catchphrase in the province.