(Yicai Global) March 20 -- Shanghai's international airports have strengthened their measures to catch Covid-19 infections as the eastern city has reported only imported new cases this week. 

Staff at Shanghai Pudong International Airport were asking new arrivals to register their recent travel history and health status on March 18.

Some of the health registration processes could be done via a mobile application.

Airport staff led a group of people who had been to key Covid-19 regions to charter vehicles that would transport them to their destinations to start their 14-day quarantines.

People were waiting for charter vehicles at the parking lot.

A staff member checked passengers' immigration data before they could board the bus.

Editor: Dou Shicong, Emmi Laine